From: Thérèse Godefroy Date: Thu, 28 Sep 2017 16:55:31 +0000 (+0200) Subject: ar, ml: remove because the translation is incomplete. X-Git-Url: https://vcs.fsf.org/?a=commitdiff_plain;h=bf01c877dfad93b1863358bef1d42c9011d06c65;p=enc-live.git ar, ml: remove because the translation is incomplete. --- diff --git a/ar/confirmation.html b/ar/confirmation.html deleted file mode 100644 index d7bc70e..0000000 --- a/ar/confirmation.html +++ /dev/null @@ -1,104 +0,0 @@ - - - - - - Email Self-Defense - a guide to fighting surveillance with GnuPG encryption - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ar/emailselfdefense_source.zip b/ar/emailselfdefense_source.zip deleted file mode 100644 index 6ee979a..0000000 Binary files a/ar/emailselfdefense_source.zip and /dev/null differ diff --git a/ar/index.html b/ar/index.html deleted file mode 100644 index df87312..0000000 --- a/ar/index.html +++ /dev/null @@ -1,524 +0,0 @@ - - - - - - Email Self-Defense - a guide to fighting surveillance with GnuPG encryption - - - - - - - - - - - - - - - -
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#1 Get the pieces

-

This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Windows). Learn more about free software at fsf.org.

- -

Most GNU/Linux operating systems come with GnuPG installed on them, so you don't have to download it. Before configuring GnuPG though, you'll need a desktop email program installed on your computer. Most GNU/Linux distributions have a free software version of the Thunderbird email program available to install. This guide will work with them, in addition to Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.

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If you already have one of these, you can skip to Step 1.b.

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Step 1.a Setup your email program with your email account (if it isn't already)

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Open your email program and follow the wizard that sets it up with your email account.

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-

Troubleshooting

-
-
What's a wizard?
-
A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
-
My email program can't find my account or isn't downloading my mail
-
Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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Step 1.b Install the Enigmail plugin for your email program

-

In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.

-

If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.

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Troubleshooting

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-
I can't find the menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
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#2 Make your keys

-

To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.

- -

Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.

- -

Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.

-
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Step 2.a Make a keypair

-

In your email program's menu, select OpenPGP → Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.

-

On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."

-

Use the default options until you reach the screen titled "Create Key".

-

On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!

-

The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.

-

When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there). You'll learn more about the revocation certificate in Section 5. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.

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Troubleshooting

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-
I can't find the OpenPGP menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
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The wizard says that it cannot find GnuPG.
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Open whatever program you usually use for installing software, and search for GnuPG, then install it. Then restart the Engimail setup wizard by going to OpenPGP → Setup Wizard.
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Step 2.b Upload your public key to a keyserver

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In your email program's menu, select OpenPGP → Key Management.

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Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.

-

Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.

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-

Troubleshooting

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-
The progress bar never finis
-
Close the upload popup, make sure you are connected to the Internet, and try again. If that doesn't work, try again, selecting a different keyserver.
-
My key doesnt appear in the list
-
Try checking Show Default Keys.
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-
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GnuPG, OpenPGP, what?

-

You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.

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#3 Try it out!

-

Now you'll try a test correspondence with a computer program named Edward, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

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Step 3.a Send Edward your public key

-

This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

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Address the message to edward-en@fsf.org. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

- -

It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once he's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

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Step 3.b Send a test encrypted email

-

Write a new email in your email program, addressed to edward-en@fsf.org. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

-

Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email.

-

Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, unique signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

-

Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

- -

To encrypt an email to Edward, you need his public key, so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

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Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Edward's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

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Troubleshooting

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Enigmail can't find Edward's key
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Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
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Important: Security tips

-

Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

-

It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

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Step 3.c Receive a response

-

When Edward receives your email, he will use his private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

-

Since you encrypted this email with Edward's public key, Edward's private key is required to decrypt it. Edward is the only one with his private key, so no one except him — not even you — can decrypt it.

-

It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

-

When you receive Edward's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

-

Notice the bar that Enigmail shows you above the message, with information about the status of Edward's key.

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#4 Learn the Web of Trust

-

Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

- -

When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, forming a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

- -

People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Edward's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that people can double-check that they have the correct public key when they download yours from a keyserver.

- -

You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Edward. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to whom are trying to communicate to verify which one to use.

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Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Edward's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click ok.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit ok.

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You've just effectively said "I trust that Edward's public key actually belongs to Edward." This doesn't mean much because Edward isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. If you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Edward sent you. Because Edward encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

-

Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk, or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file to let people know that you are no longer using that keypair.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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- - - - - - - - - - - - - - - diff --git a/ar/infographic.html b/ar/infographic.html deleted file mode 100644 index 865d3b5..0000000 --- a/ar/infographic.html +++ /dev/null @@ -1,94 +0,0 @@ - - - - - - Email Self-Defense - a guide to fighting surveillance with GnuPG encryption - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ar/mac.html b/ar/mac.html deleted file mode 100644 index 7430f7d..0000000 --- a/ar/mac.html +++ /dev/null @@ -1,551 +0,0 @@ - - - - - - Email Self-Defense - a guide to fighting surveillance with GnuPG encryption - - - - - - - - - - - - - - - -
-
- -
-

#1 Get the pieces

-

This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Mac OS). To defend your freedom as well as protect yourself from surveillance, we recommend you switch to a free software operating system like GNU/Linux. Learn more about free software at fsf.org.

-

To get started, you'll need a desktop email program installed on your computer. This guide works with free software versions of the Thunderbird email program, and with Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.

-

If you already have one of these, you can skip to Step 1.b.

-
- - -
- -
-

Step 1.a Setup your email program with your email account (if it isn't already)

-

Open your email program and follow the wizard that sets it up with your email account.

- - -
-

Troubleshooting

-
-
What's a wizard?
-
A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
-
My email program can't find my account or isn't downloading my mail
-
Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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Step 1.b Get GnuPG by downloading GPGTools

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GPGTools is a software package that includes GnuPG. Download and install it, choosing default options whenever asked. After it's installed, you can close any windows that it creates.

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Step 1.c Install the Enigmail plugin for your email program

-

In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.

-

If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.

- -
-

Troubleshooting

-
-
I can't find the menu.
-
In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
- - - -
-
-
-
-
-
- - -
-
- -
-

#2 Make your keys

-

To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.

- -

Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.

- -

Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.

-
- - -
- -
-

Step 2.a Make a keypair

-

In your email program's menu, select OpenPGP → Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.

-

On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."

-

Use the default options until you reach the screen titled "Create Key".

-

On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!

-

The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.

-

When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there). You'll learn more about the revocation certificate in Section 5. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.

- - -
-

Troubleshooting

-
-
I can't find the OpenPGP menu.
-
In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
- - - - -
-
-
-
-
-
-

Step 2.b Upload your public key to a keyserver

-

In your email program's menu, select OpenPGP → Key Management.

-

Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.

-

Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.

- -
-

Troubleshooting

-
-
The progress bar never finishes
-
Close the upload popup, make sure you are connected to the Internet, and try again. If that doesn't work, try again, selecting a different keyserver.
-
My key doesnt appear in the list
-
Try checking Show Default Keys.
- - - - -
-
- - - -
-
- -
-
-

GnuPG, OpenPGP, what?

-

You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.

-
-
-
-
- - -
-
- -
-

#3 Try it out!

-

Now you'll try a test correspondence with a computer program named Edward, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

-
- - -
- -
-

Step 3.a Send Edward your public key

-

This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

- -

Address the message to edward-en@fsf.org. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

- -

It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once he's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

-
-
- - -
-
-

Step 3.b Send a test encrypted email

-

Write a new email in your email program, addressed to edward-en@fsf.org. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

-

Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email.

-

Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, unique signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

-

Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

- -

To encrypt an email to Edward, you need his public key, so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

- -

Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Edward's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

- -
-

Troubleshooting

-
-
Enigmail can't find Edward's key
-
Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
- - -
-
-
-
- - -
-
-

Important: Security tips

-

Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

-

It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

-
-
- - - -
-
-

Step 3.c Receive a response

-

When Edward receives your email, he will use his private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

-

Since you encrypted this email with Edward's public key, Edward's private key is required to decrypt it. Edward is the only one with his private key, so no one except him — not even you — can decrypt it.

-

It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

-

When you receive Edward's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

-

Notice the bar that Enigmail shows you above the message, with information about the status of Edward's key.

-
-
- - -
-
- - - - -
-
- -
-

#4 Learn the Web of Trust

-

Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

- -

When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, forming a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

- -

People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Edward's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that people can double-check that they have the correct public key when they download yours from a keyserver.

- -

You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Edward. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to whom are trying to communicate to verify which one to use.

- - -
- - -
- -
-

Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Edward's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click ok.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit ok.

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You've just effectively said "I trust that Edward's public key actually belongs to Edward." This doesn't mean much because Edward isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. If you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Edward sent you. Because Edward encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

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Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk, or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file to let people know that you are no longer using that keypair.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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#6 Next steps

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You've now completed the basics of email encryption with GnuPG, taking action against bulk surveillance. A pat on the back to you! These next steps will help make the most of the work you did today.

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Join the movement

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You've just taken a huge step towards protecting your privacy online. But each of us acting alone isn't enough. To topple bulk surveillance, we need to build a movement for the autonomy and freedom of all computer users. Join the Free Software Foundation's community to meet like-minded people and work together for change:

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Join us on microblogging services for day-to-day updates:

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GNU Social | Pump.io | Twitter

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Read why GNU Social and Pump.io are better than Twitter.

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Get your friends involved

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This is the single biggest thing you can do to promote email encryption.

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Before you close this guide, use our sharing page to compose a message to a few friends and ask them to join you in using encrypted email. Remember to include your GnuPG public key ID so they can easily download your key.

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It's also great to add your public key fingerprint to your email signature so that people you are corresponding with know you accept encrypted email.

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We recommend you even go a step further and add it to your social media profiles, blog, Website, or business card. (At the Free Software Foundation, we put ours on our staff page.) We need to get our culture to the point that we feel like something is missing when we see an email address without a public key fingerprint.

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Protect more of your digital life

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Learn surveillance-resistant technologies for instant messages, hard drive storage, online sharing, and more at the Free Software Directory's Privacy Pack and prism-break.org.

If you are using Windows, Mac OS or any other proprietary operating system, we recommend you switch to a free software operating system like GNU/Linux. This will make it much harder for attackers to enter your computer through hidden back doors. Check out the Free Software Foundation's endorsed versions of GNU/Linux.

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Make Email Self-Defense tools even better

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Leave feedback and suggest improvements to this guide. We welcome translations, but we ask that you contact us at campaigns@fsf.org before you start, so that we can connect you with other translators working in your language.

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If you like programming, you can contribute code to GnuPG or Enigmail.

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To go the extra mile, support the Free Software Foundation so we can promote Email Self-Defense as heavily as possible, and make more tools like it.

Donate Join now

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#1 Get the pieces

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This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Windows). To defend your freedom as well as protect yourself from surveillance, we recommend you switch to a free software operating system like GNU/Linux. Learn more about free software at fsf.org.

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To get started, you'll need a desktop email program installed on your computer. This guide works with free software versions of the Thunderbird email program, and with Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.

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If you already have one of these, you can skip to Step 1.b.

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Step 1.a Setup your email program with your email account (if it isn't already)

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Open your email program and follow the wizard that sets it up with your email account.

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Troubleshooting

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What's a wizard?
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A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
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My email program can't find my account or isn't downloading my mail
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Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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Step 1.b Get GnuPG by downloading GPG4Win

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GPG4Win is a software package that includes GnuPG. Download and install it, choosing default options whenever asked. After it's installed, you can close any windows that it creates.

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Step 1.c Install the Enigmail plugin for your email program

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In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.

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If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.

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Troubleshooting

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In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
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#2 Make your keys

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To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.

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Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.

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Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.

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Step 2.a Make a keypair

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In your email program's menu, select OpenPGP → Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.

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On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."

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Use the default options until you reach the screen titled "Create Key".

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On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!

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The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.

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When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there). You'll learn more about the revocation certificate in Section 5. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.

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Troubleshooting

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In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
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Step 2.b Upload your public key to a keyserver

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In your email program's menu, select OpenPGP → Key Management.

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Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.

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Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.

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Troubleshooting

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Close the upload popup, make sure you are connected to the Internet, and try again. If that doesn't work, try again, selecting a different keyserver.
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Try checking Show Default Keys.
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GnuPG, OpenPGP, what?

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You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.

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#3 Try it out!

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Now you'll try a test correspondence with a computer program named Edward, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

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Step 3.a Send Edward your public key

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This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

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Address the message to edward-en@fsf.org. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

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It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once he's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

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Step 3.b Send a test encrypted email

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Write a new email in your email program, addressed to edward-en@fsf.org. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

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Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email.

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Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, unique signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

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Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

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To encrypt an email to Edward, you need his public key, so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

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Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Edward's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

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Troubleshooting

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Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
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Important: Security tips

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Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

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It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

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Step 3.c Receive a response

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When Edward receives your email, he will use his private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

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Since you encrypted this email with Edward's public key, Edward's private key is required to decrypt it. Edward is the only one with his private key, so no one except him — not even you — can decrypt it.

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It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

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When you receive Edward's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

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Notice the bar that Enigmail shows you above the message, with information about the status of Edward's key.

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#4 Learn the Web of Trust

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Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

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When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, forming a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

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People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Edward's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that people can double-check that they have the correct public key when they download yours from a keyserver.

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You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Edward. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to whom are trying to communicate to verify which one to use.

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Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Edward's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click ok.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit ok.

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You've just effectively said "I trust that Edward's public key actually belongs to Edward." This doesn't mean much because Edward isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. If you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Edward sent you. Because Edward encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

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Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk, or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file to let people know that you are no longer using that keypair.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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#1 ആവശ്യമുള്ള വസ്തുക്കൾ

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ഈ മാര്‍ഗ്ഗദര്‍ശിയിൽ നാം സ്വതന്ത്ര ഉപയോഗ അനുമതിയുള്ള പ്രോഗ്രാമുകളാണ് ഉപയോഗിക്കുന്നത്; അതിനാൽ ഇവ തികച്ചും സുതാര്യവും ആര്ക്കും ഇവയുടെ പകര്പ്പ് ഉണ്ടാക്കിയോ അവരുടേതായ മാറ്റങ്ങൾ വരുത്തിയോ ഉപയോഗിക്കവുന്ന്നതും ആണ്. അതിനാൽ ഇവ മറ്റു സ്വകാര്യ ഉടമസ്ഥതയിലുള്ള (വിൻഡോസ്‌ പോല്യെയുള്ള) പ്രോഗ്രമ്മുകലെക്കൾ നിരീക്ഷണത്തിൽ നിന്ന് സുരക്ഷിതമാണ്. സ്വതന്ത്ര സോഫ്റ്റ്‌വെയരിനെക്കുറിച്ച് കൂടുതലറിയാൻ fsf.org സന്ദര്ശിക്കുക.

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ഭൂരിഭാഗം ഗ്നു/ലിനക്സ്‌ ഓപ്പറേറ്റിങ്ങ് സിസ്റ്റങ്ങളിലും GnuPG ആദ്യമേ തന്നെ ഉണ്ടാവും, അതുകൊണ്ട് നിങ്ങള്ക്ക് അത് പ്രത്യേകമായി ഡൌണ്‍ലോഡ് ചെയ്ത് ഇൻസ്റ്റോൾ ചെയ്യേണ്ടി വരില്ല. പക്ഷെ GnuPG ക്രെമീകരിക്കുന്നതിനു മുന്പായി നിങ്ങളുടെ കമ്പ്യൂട്ടറിൽ ഒരു ഇമെയിൽ പ്രോഗ്രാം ഇൻസ്റ്റോൾ ചെയ്യേണ്ടതായി ഉണ്ട്. മിക്കവാറും ഗ്നു/ലിനക്സ്‌ ഓപ്പറേറ്റിങ്ങ് സിസ്റ്റങ്ങളിലും തണ്ടർബർഡ്‌ എന്നാ ഇമെയിൽ പ്രോഗ്രാമിന്റെ ഒരു സ്വതന്ത്ര പതിപ്പ് ഇൻസ്റ്റോൾ ചെയ്യാൻ സാധിക്കും. ഈ മാർഗദർശി തണ്ടർബർഡിനോപ്പം തന്നെ അതിന്റെ മറ്റു സ്വതന്ത്ര പതിപ്പുകളിലും ഉപയോഗിക്കാം. നിങ്ങൾ സാധാരണയായി വെബ്‌ ബ്രൌസർ വഴി ഉപയോഗിക്കുന്ന ഇമെയിൽ അക്കൗന്ണ്ടുകൾ (ജീമൈൽ പോലുള്ളവ) ഉപയോഗിക്കുന്നതിനുള്ള മറ്റോരു മാര്ഗ്ഗമാണ് ഇമെയിൽ പ്രോഗ്രാമുകൾ, പക്ഷെ ബ്രൌസർ വഴി ഉപയോഗിക്കുമ്പോൾ ലഭിക്കാത്ത ചില സവിശേഷതകൾ ഇമെയിൽ പ്രോഗ്രാമുകളിൽ നിന്ന് ലഭിക്കും.

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നിങ്ങളുടെ കമ്പ്യൂട്ടറിൽ ഇത്തരം ഒരു ഇമെയിൽ പ്രോഗ്രാം ഉണ്ടെങ്കിൽ നിങ്ങൾക്ക് നേരിട്ട് പടി 1.ബി യിലേക്ക് പോകാവുന്നതാണ്.

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പടി 1.എ നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാം നിങ്ങളുടെ ഇമെയിൽ ഉപയോഗിക്കാൻ തയ്യാറാക്കുക (മുന്പേതന്നെ അങ്ങനെ ചെയ്തിട്ടില്ലെങ്കിൽ)

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നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാം തുരന്നിട്ട്നി ങ്ങളുടെ ഇമെയിൽ വിലാസവുമായി അത് ബന്ധിപ്പിക്കാനുള്ള wizard പ്രോഗ്രാമിന്റെ നിർദശങ്ങൾ അനുസരിക്കുക.

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Troubleshooting

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What's a wizard?
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A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
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My email program can't find my account or isn't downloading my mail
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Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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പടി 1.ബി എനിഗ്മെയിൽ (Enigmail) എന്ന അനുബന്ധ പ്രോഗ്രാം (plugin) നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാമ്മിൽ ചേര്ക്കുക.

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നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാമിന്റെ മെനുവിൽ നിന്ന് Add-ons എന്നത് തിരഞ്ഞെടുക്കുക (അത് Tools എന്ന വിഭാഗത്തിന് കീഴിൽ ആവാൻ സാധ്യത ഉണ്ട് ). ഇടതു വശത്ത് Extensions എന്നതാണ് തിരഞ്ഞെടുത്തിരിക്കുന്നതെന്ന് ഉറപ്പു വരുത്തുക. നിങ്ങൾ Enigmail എന്നത് കാണുന്നുണ്ടോ? ഉണ്ടെങ്കിൽ ഈ പടി ഒഴിവാക്കുക.

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ഇല്ലയെന്നുന്ടെങ്കിൽ വലതു വശത്ത് മുകളിലായുള്ള സെർച്ച്‌ സംവിധാനത്തിൽ "Enigmail" എന്ന് സെർച്ച്‌ ചെയ്യുക. അത് ഇൻസ്റ്റോൾ ചെയ്തതിനു ശേഷം നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാം റീസ്റ്റാർട്ട്‌ ചെയ്യുക.

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Troubleshooting

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I can't find the menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
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#2 നിങ്ങളുടെ രഹസ്യ വാക്കുകൾ ഉണ്ടാക്കുക

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GnuPG സിസ്റ്റം ഉപയോഗിക്കാൻ നിങ്ങള്ക്ക് ഒരു പൊതു താക്കോൽ വാക്കും ഒരു സ്വകാര്യ താക്കോൽ വാക്കും ഉണ്ടായിരിക്കണം (ഇവയെ ഒന്നിച്ച ഒരു കീ ജോഡി അഥവാ കീ പെയർ എന്ന് പറയുന്നു). ഈ ഓരോ താക്കോൽ വാക്കും നിങ്ങൾക്ക് മാത്രമായി പ്രത്യേക ക്രമത്തിൽ അടുക്കിയ ഒരു പറ്റം അക്ഷരങ്ങളുടെയും അക്കങ്ങളുടെയും നീണ്ട നിരകൾ ആണ്. നിങ്ങളുടെ പൊതു താക്കോൽ വാക്കും സ്വകാര്യ താക്കോൽ വാക്കും ഒരു പ്രത്യേക ഗണിതശാസ്ത്ര സൂത്രസംജ്ഞ ഉപയോഗിച്ച് പരസ്പരം ബന്ധിപ്പിച്ചിട്ടുണ്ട്.

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നിങ്ങളുടെ പൊതു താക്കോൽ വാക്ക് ഒരു സാധാരണ ഭൗതിക താക്കോൽ പോലെയല്ല, കാരണം ഇത് ആര്ക്കും ലഭ്യമായ വിധത്തിൽ കീ-സെർവർ എന്നറിയപ്പെടുന്ന ഒരു പൊതു ഡയറക്ടറിയിലാണ് സൂക്ഷിച്ചിരിക്കുന്നത്. ആളുകള്ക്ക് നിങ്ങളുടെ താക്കോൽ വാക്കുകൾ ഡൌണ്‍ലോഡ് ചെയ്ത് GnuPG-യുടെ സഹായത്തോടെ അതുപയോഗിച്ച് നിങ്ങള്ക്ക് അയക്കാനുള്ള ഇമെയിൽ സന്ദേശങ്ങൾ എൻക്രിപ്റ്റ് ചെയ്യാൻ സാധിക്കും. നിങ്ങൾക്ക് എൻക്രിപ്റ്റ് ചെയ്ത സന്ദേശങ്ങൾ അയക്കാൻ താൽപ്പര്യമുള്ളവർക്ക് നിങ്ങളുടെ പൊതു താക്കോൽ വാക്ക് തേടുവാനുള്ള ഒരു വിലാസ പുസ്തകം പോലെ നിങ്ങൾക്ക് കീ-സെർവറിനെ കാണാവുന്നതാണ്.

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നിങ്ങളുടെ സ്വകാര്യ താക്കോൽ വാക്കിന് ഒരു ഭൌതിക താക്കൊലിനോടാണ് സാമ്യം, കാരണം അത് നിങ്ങൾ സ്വകാര്യമായി (നിങ്ങളുടെ കമ്പ്യൂട്ടറിൽ) സൂക്ഷിക്കുന്ന ഒന്നാണ്. നിങ്ങള്ക്ക് GnuPG യും നിങ്ങളുടെ സ്വകാര്യ താക്കോൽ വാക്കും ഉപയോഗിച്ച് മറ്റുള്ളവർ നിങ്ങള്ക്ക് അയക്കുന്ന രഹസ്യ സന്ദേശങ്ങൾ ഡീക്രിപ്റ്റ് ചെയ്യാൻ സാധിക്കും.

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സ്ടെപ് 2.a കീപേര്‍ ഉണ്ടാക്കൂ

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നിങ്ങളുടെ ഇമേയില്‍ പ്രോഗ്രാമിന്റെ മെനുവില്‍, OpenPGP → Setup Wizard എടുക്കുക. അതു കഴിഞ്ഞ് വരുന്ന വിന്‍ഡോയിലേ ഉള്ളടക്കങ്ങള്‍ വായിക്കേണ്ട ആവിശ്യമില്ലെങ്കിലും നിങ്ങള്‍ക്ക് താല്പര്യമുണ്ടെങ്കില്‍ വായിക്കാം. പക്ഷെ അതിന് ശേഷം വരുന്ന സ്ക്രീനുകളുടെ ഉള്ളടക്കങ്ങള്‍ വായിക്കുന്നത് നല്ലതായിരിക്കും.

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"Signing" എന്ന പേരുള്ള രണ്ടാമത്തെ സ്ക്രീനില്‍, "വേണ്ടാ, എനിക്ക് ഓരോ സ്വീകര്‍ത്താവിനും ഇമേയില്‍ നിയമങ്ങല്‍ അടയാളപ്പെടുത്തണം" എന്ന് തിരഞ്ഞെടുക്കുക.

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"Create Key" എന്ന സ്ക്രീനില്‍ എത്തുന്നത് വരെ സ്വമേധെയുള്ള ഓപ്ഷനുകള്‍ ഉപയോഗിക്കുക.

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"Create Key" എന്ന സ്ക്രീനില്‍, ഒരു കടുപ്പമുളള പാസ് വര്‍ഡ് തിരഞ്ഞെടുക്കുക! നിങ്ങളുടെ പാസ് വര്‍ഡിന് കുറഞ്ഞത് 12 അക്ഷരങ്ങളെങ്കിലും ഉണ്ടാവണം അതോടൊപ്പം തന്നെ ഒരു ചെറിയ അക്ഷരവും ഒരു വലിയ അക്ഷരവും ഒരു അക്കമെങ്കിലും അല്ലെങ്കില്‍ ഒരു നിര്‍ത്തടയാളമോ ഉണ്ടാവണം. നിങ്ങളുടെ പാസ് വര്‍ഡ് മറന്ന് പോകരുത്, അല്ലെങ്കില്‍ ഈ ചെയ്ത എല്ല പണികളും വ്യര്‍ത്ഥമായി പോകും.

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"Key Creation" എന്ന സ്ടെപ് തീരാന്‍ പ്രോഗ്രാം കുറച്ച് സമയമെടുക്കും. കാതിരിക്കുന്ന സമയത്ത് ഒരു പടം കാണുകയോ വെബ് ബ്രൗസ് ചെയുകയോ അല്ലെങ്കില്‍ കമ്പ്യൂറ്ററില്‍ വേറേ എന്തെങ്കിലും ചെയ്തോളൂ. എത്രമാത്രം കൂടുതല്‍ നിങ്ങള്‍ നിങ്ങളുടെ കമ്പ്യൂറ്റര്‍ ഉപയോഗികുന്നോ, അത്രേം പെട്ടന്ന് കീ ഉണ്ടാക്കല്‍ ന്നദക്കും.

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OpenGP ഉറപ്പാക്കല്‍ സ്ക്രീന്‍ വരുമ്പോള്‍, ജെനറേറ്റ് സര്‍റ്റിഫികറ്റ് തിരഞ്ഞെടുതിട്ട് കമ്പ്യൂറ്ററില്‍ സുരക്ഷിതമായ ഏതെങ്കിലുമിടത്ത് സൂക്ഷിക്കുക ("Revocation Certificate" എന്ന പേരില്‍ നിങ്ങളുടെ ഹോം ഫോല്‍ഡറില്‍ ഒരു ഫോല്‍ഡര്‍ ഉണ്ടാക്കാന്‍ ഞങ്ങള്‍ ശുപാര്‍ശ ചെയ്യുന്നു). രിവോക്കേഷന്‍ സര്‍റ്റിഫികറ്റിനെ കുറിച്ച് നിങ്ങള്‍ സെക്ഷന്‍ 5ല്‍ കൂടുതല്‍ പഠിക്കും. സെറ്റപ് അത് ഒരു ബാഹ്യ ഉപകരണത്തിലേക്ക് മാറ്റാന്‍ പറയുമെങ്കിലും അത് ഇപ്പോള്‍ ആവിശ്യമില്ല.

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Troubleshooting

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I can't find the OpenPGP menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
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The wizard says that it cannot find GnuPG.
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Open whatever program you usually use for installing software, and search for GnuPG, then install it. Then restart the Engimail setup wizard by going to OpenPGP → Setup Wizard.
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സ്ടെപ് 2.b നിങ്ങളുടെ പബ്ലിക് കീ ഒരു കീസെര്‍വറിലേക്ക് അപ്ലോട് ചെയ്യുക

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നിങ്ങളുടെ ഇമേയില്‍ പ്രോഗ്രാമിന്റെ മെനുവില്‍, OpenPGP → Key Management എന്ന് തിരഞ്ഞെടുക്കുക.

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നിങ്ങളുടെ കീയില്‍ രൈറ്റ് ക്ലിക്ക് ചെയ്ത് "Upload Public Keys to Keyserver" തിരഞ്ഞെടുക്കുക. പോപ് അപ്പില്‍ സ്വമേധെയുള്ള കീസെര്‍വര്‍ ഉപ്യോഗിക്കുക.

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ഇനീം നിങ്ങള്‍ക്ക് ആരെങ്കിലും ഒരു encrypted സന്ദേശം അയക്കാന്‍ ആഗ്രഹിക്കുന്നുണ്ടെങ്കില്‍, അവര്‍ക്ക് നിങ്ങളുടെ പബ്ലിക് കീ ഇന്റര്‍നെറ്റില്‍ നിന്നും ഡൗന്‍ലോഡ് ചെയ്യാം. മെനുവില്‍ ഒന്നിലധികം കീസെര്‍വറുകള്‍ ലഭ്യമാണ്, പക്ഷെ അവയെല്ലാം അന്യോന്ന്യം പകര്‍പ്പുകളാണ്, അതുക്കോണ്ട് നിങ്ങള്‍ ഏത് കീസെര്‍വര്‍ ഉപയോഗിച്ചാലും കുഴപ്പമില്ല. പക്ഷേ ചിലാപ്പോള്‍ ഒരു പുതിയ കീ അപ്ലോട് ചെയ്ത് കഴിഞ്ഞ് കുറച്ച് കഴിഞ്ഞ ശേഷം മാത്രമേ അത് എല്ലയിടത്തും കിട്ടുകയൊള്ളു.

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Troubleshooting

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The progress bar never finishes
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Close the upload popup, make sure you are on the Internet and try again. If that doesn't work, try again, selecting a different keyserver.
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My key doesnt appear in the list
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Try checking Show Default Keys.
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GnuPG, OpenPGP, എന്താണാവ?

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നിങ്ങൾ GnuPG എന്ന ഒരു പ്രോഗ്രാമാണ് ഉപയോഗിക്കുന്നത്, എന്നാൽ നിങ്ങളുടെ ഇമെയിൽ പ്രോഗ്രാമിന്റെ മെനുവിൽ OpenPGP എന്നാവും എഴുതിയിരിക്കുന്നത്. കുഴക്കുന്ന കാര്യമാണ്, അല്ലെ? പൊതുവിൽ GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP എന്നീ പദങ്ങളെല്ലാം തന്നെ പരസ്പരം ഒത്തുമാറി ഉപയോഗിക്കാവുന്നവയണെങ്കിലും അവയുടെ അർഥങ്ങൾ സൂക്ഷ്മ വ്യെത്യാസങ്ങൾ ഉള്ളവയാണ്.

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#3 പരീക്ഷിച്ചുനോക്കൂ!

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ഇപ്പോൾ നിങ്ങൾക്ക് എഡ്വേര്ഡ് എന്ന എൻക്രിപ്ഷൻ ഉപയോഗിക്കനരിയവുന്ന കമ്പ്യൂട്ടർ പ്രോഗ്രാമുമായി ഒരു പരീക്ഷണ സംഭാഷണത്തിൽ എർപെട്ടു നോക്കാം. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

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Step 3.a Send Adele your public key

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This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

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Address the message to adele-en@gnupp.de. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

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It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once she's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

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Step 3.b Send a test encrypted email

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Write a new email in your email program, addressed to adele-en@gnupp.de. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

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Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email with the key you downloaded in the last step.

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Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, uniqe signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

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Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

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To encrypt and email to Adele, you need her public key, and so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

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Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Adele's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

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Troubleshooting

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Enigmail can't find Adele's key
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Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
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Important: Security tips

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Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

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It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

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Step 3.c Receive a response

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When Adele receives your email, she will use her private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

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Since you encrypted this email with Adele's public key, Adele's private key is required to decrypt it. Adele is the only one with her private key, so no one except her — not even you — can decrypt it.

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It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

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When you receive Adele's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

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Notice the bar that Enigmail shows you above the message, with information about the status of Adele's key.

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#4 Learn the Web of Trust

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Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

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When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, into a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

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People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Adele's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that so that people can double-check that they have the correct public key when they download yours from a keyserver.

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You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Adele. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to are trying to communicate to verify which one to use.

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Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Adele's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click OK.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit OK.

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You've just effectively said "I trust that Adele's public key actually belongs to Adele." This doesn't mean much because Adele isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. This is because, if you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Adele sent you. Because Adele encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

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Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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#1 Get the pieces

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This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Windows). To defend your freedom as well as protect yourself from surveillance, we recommend you switch to a free software operating system like GNU/Linux. Learn more about free software at fsf.org.

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To get started, you'll need a desktop email program installed on your computer. This guide works with free software versions of the Thunderbird email program, and with Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like GMail), but provide extra features.

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If you are already have one of these, you can skip to Step 1.b.

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Step 1.a Set your email program up with your email account (if it isn't already)

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Open your email program and follow the wizard that sets it up with your email account.

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Troubleshooting

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What's a wizard?
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A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
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My email program can't find my account or isn't downloading my mail
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Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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Step 1.b Get GnuPG by downloading GPGTools

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GPGTools is a software package that includes GnuPG. Download and install it, choosing default options whenever asked. After it's installed, you can close any windows that it creates.

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Step 1.c Install the Enigmail plugin for your email program

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In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.

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If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.

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Troubleshooting

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I can't find the menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
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#2 Make your keys

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To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.

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Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.

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Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.

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Step 2.a Make a keypair

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In your email program's menu, select OpenPGP → Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.

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On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."

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Use the default options until you reach the screen titled "Create Key".

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On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!

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The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.

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When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there. You'll learn more about the revocation certificate in Section 5. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.

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Troubleshooting

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I can't find the OpenPGP menu.
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In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
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Step 2.b Upload your public key to a keyserver

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In your email program's menu, select OpenPGP → Key Management.

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Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.

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Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.

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Troubleshooting

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The progress bar never finishes
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Close the upload popup, make sure you are on the Internet and try again. If that doesn't work, try again, selecting a different keyserver.
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My key doesnt appear in the list
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Try checking Show Default Keys.
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GnuPG, OpenPGP, what?

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You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.

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#3 Try it out!

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Now you'll try a test correspondence with a computer program named Adele, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

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Step 3.a Send Adele your public key

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This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

- -

Address the message to adele-en@gnupp.de. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

- -

It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once she's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

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Step 3.b Send a test encrypted email

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Write a new email in your email program, addressed to adele-en@gnupp.de. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

-

Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email with the key you downloaded in the last step.

-

Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, uniqe signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

-

Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

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To encrypt and email to Adele, you need her public key, and so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

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Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Adele's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

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Troubleshooting

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Enigmail can't find Adele's key
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Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
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Important: Security tips

-

Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

-

It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

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Step 3.c Receive a response

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When Adele receives your email, she will use her private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

-

Since you encrypted this email with Adele's public key, Adele's private key is required to decrypt it. Adele is the only one with her private key, so no one except her — not even you — can decrypt it.

-

It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

-

When you receive Adele's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

-

Notice the bar that Enigmail shows you above the message, with information about the status of Adele's key.

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#4 Learn the Web of Trust

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Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

- -

When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, into a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

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People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Adele's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that so that people can double-check that they have the correct public key when they download yours from a keyserver.

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You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Adele. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to are trying to communicate to verify which one to use.

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Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Adele's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click OK.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit OK.

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You've just effectively said "I trust that Adele's public key actually belongs to Adele." This doesn't mean much because Adele isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. This is because, if you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Adele sent you. Because Adele encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

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Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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#6 Next steps

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You've now completed the basics of email encryption with GnuPG, taking action against bulk surveillance. A pat on the back to you! These next steps will help make the most of the work you did today.

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Join the movement

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You've just taken a huge step towards protecting your privacy online. But each of us acting alone isn't enough. To topple bulk surveillance, we need to build a movement for the autonomy and freedom of all computer users. Join the Free Software Foundation's community to meet like-minded people and work together for change:

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Join us on microblogging services for day-to-day updates:

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- - -  GNU Social - |  - - -  Pump.io - |  - Twitter -

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Read why GNU Social and Pump.io are better than Twitter.

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Get your friends involved

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Before you close this guide, use our sharing page to compose a message to a few friends and ask them to join you in using encrypted email. Remember to include your GnuPG public key ID so they can easily download your key.

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Protect more of your digital life

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Learn surveillance-resistant technologies for instant messages, hard drive storage, online sharing and more at the Free Software Directory's Privacy Pack and prism-break.org.

If you are using Windows, Mac OS or any other proprietary operating system, the biggest single step you can make is to switch to a free software operating system like GNU/Linux. This will make it much harder for attackers to enter your computer through hidden back doors. Check out the Free Software Foundation's endorsed versions of GNU/Linux.

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Make Email Self-Defense tools even better

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Leave feedback and suggest improvements to this guide. We welcome translations, but we ask that you contact us at campaigns@fsf.org before you start, so that we can connect you with other translators working in your language.

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If you like programming, you can contribute code to GnuPG or Enigmail.

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To go the extra mile, support the Free Software Foundation so we can promote Email Self-Defense as heavily as possible, and make more tools like it.

Donate Join now

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#1 Get the pieces

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This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Windows). To defend your freedom as well as protect yourself from surveillance, we recommend you switch to a free software operating system like GNU/Linux. Learn more about free software at fsf.org.

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To get started, you'll need a desktop email program installed on your computer. This guide works with free software versions of the Thunderbird email program, and with Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like GMail), but provide extra features.

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If you are already have one of these, you can skip to Step 1.b.

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Step 1.a Set your email program up with your email account (if it isn't already)

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Open your email program and follow the wizard that sets it up with your email account.

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Troubleshooting

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What's a wizard?
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A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.
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My email program can't find my account or isn't downloading my mail
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Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.
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Step 1.b Get GnuPG by downloading GPG4Win

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GPG4Win is a software package that includes GnuPG. Download and install it, choosing default options whenever asked. After it's installed, you can close any windows that it creates.

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Step 1.c Install the Enigmail plugin for your email program

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In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.

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If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.

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Troubleshooting

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In many new email programs, the main menu is represented by an image of three stacked horizontal bars.
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#2 Make your keys

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To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.

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Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.

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Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.

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Step 2.a Make a keypair

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In your email program's menu, select OpenPGP → Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.

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On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."

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Use the default options until you reach the screen titled "Create Key".

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On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!

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The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.

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When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there. You'll learn more about the revocation certificate in Section 5. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.

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Troubleshooting

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In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.
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Step 2.b Upload your public key to a keyserver

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In your email program's menu, select OpenPGP → Key Management.

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Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.

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Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.

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Troubleshooting

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Close the upload popup, make sure you are on the Internet and try again. If that doesn't work, try again, selecting a different keyserver.
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Try checking Show Default Keys.
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GnuPG, OpenPGP, what?

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You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.

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#3 Try it out!

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Now you'll try a test correspondence with a computer program named Adele, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.

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Step 3.a Send Adele your public key

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This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP → Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.

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Address the message to adele-en@gnupp.de. Put at least one word (whatever you want) in the subject and body of the email, then hit send.

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It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide. Once she's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.

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Step 3.b Send a test encrypted email

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Write a new email in your email program, addressed to adele-en@gnupp.de. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.

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Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email with the key you downloaded in the last step.

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Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, uniqe signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.

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Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."

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To encrypt and email to Adele, you need her public key, and so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.

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Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Adele's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.

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Troubleshooting

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Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.
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Important: Security tips

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Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.

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It's also good practice to click the key icon in your email composition window before you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.

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Step 3.c Receive a response

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When Adele receives your email, she will use her private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.

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Since you encrypted this email with Adele's public key, Adele's private key is required to decrypt it. Adele is the only one with her private key, so no one except her — not even you — can decrypt it.

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It may take two or three minutes for Adele to respond. In the meantime, you might want to skip ahead and check out the Use it Well section of this guide.

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When you receive Adele's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.

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Notice the bar that Enigmail shows you above the message, with information about the status of Adele's key.

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#4 Learn the Web of Trust

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Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.

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When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, into a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.

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People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Adele's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP → Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that so that people can double-check that they have the correct public key when they download yours from a keyserver.

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You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Adele. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to are trying to communicate to verify which one to use.

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Step 4.a Sign a key

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In your email program's menu, go to OpenPGP → Key Management.

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Right click on Adele's public key and select Sign Key from the context menu.

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In the window that pops up, select "I will not answer" and click OK.

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In your email program's menu, go to OpenPGP → Key Management → Keyserver → Upload Public Keys and hit OK.

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You've just effectively said "I trust that Adele's public key actually belongs to Adele." This doesn't mean much because Adele isn't a real person, but it's good practice.

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Important: check people's identification before signing their keys

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Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".

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#5 Use it well

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Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.

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When should I encrypt?

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The more you can encrypt your messages, the better. This is because, if you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.

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That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.

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Important: Be wary of invalid keys

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GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.

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In your email program, go back to the second email that Adele sent you. Because Adele encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."

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When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.

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Copy your revocation certificate to somewhere safe

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Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk or hard drive stored in a safe place in your home.

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If your private key ever gets lost or stolen, you'll need this certificate file.

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Important: act swiftly if someone gets your private key

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If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the instructions on the GnuPG site. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.

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