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   6                         <title>Email Self-Defense - a guide to fighting surveillance with GnuPG encryption</title>
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  21                                 <h1>Email Self-Defense</h1>
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  78                                       We fight for computer users' rights, and promote the development of free (as in freedom) software. Resisting bulk surveillance is very important to us.
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  82                                         We want to translate this guide into more languages, and make a version for encryption on mobile devices. Please donate, and help people around the world take the first step towards protecting their privacy with free software.
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  95                                         Bulk surveillance violates our fundamental rights and makes free speech risky. This guide will teach you a basic surveillance self-defense skill: email encryption. Once you've finished, you'll be able to send and receive emails that are scrambed to make sure a surveillance agent or thief intercepting your email can't read it. All you need is a computer with an Internet connection, an email account, about forty minutes and five dice (optional, but recommended).</p>
  96
  97 <p>Even if you have nothing to hide, using encryption helps protect the privacy of people you communicate with, and makes life difficult for bulk surveillance systems. If you do have something important to hide, you're in good company; these are the same tools that Edward Snowden used to share his famous secrets about the NSA.</p>
  98
  99 <p>In addition to using encryption, standing up to surveillance requires fighting politically for a <a href="http://gnu.org/philosophy/surveillance-vs-democracy.html">reduction in the amount of data collected on us</a>, but the essential first step is to protect yourself and make surveillance of your communication as difficult as possible. This guide helps you do that. If you're just starting out, don't worry about reading the "advanced" tips; they're completely non-essential to getting you up and running. Let's get started!</p>
 100
 101                                 </div><!-- End .intro -->
 102
 103                         </div>
 104                 </header><!-- End #header -->
 105
 106 <!-- ~~~~~~~~~ Section 1: Get the pieces  ~~~~~~~~~ -->
 107                 <section class="row" id="section1">
 108                         <div>
 109                                         <!-- ~~~~~~~~~ section introduction: interspersed text  ~~~~~~~~~ -->
 110                                 <div class="section-intro">
 111                                                 <h2><em>#1</em> Get the pieces</h2>
 112 <p class="notes">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 <a href="https://u.fsf.org/ys">fsf.org</a>.</p>
 113
 114 <p>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 the IceDove desktop email program installed on your computer. Most GNU/Linux distributions have IceDove installed already, though it may be under the alternate name "Thunderbird." Email programs are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.</p>
 115                         <p>If you already have an email program, you can skip to <a href="#step-1b">Step 1.b</a>.</p>
 116                                 </div><!-- End .section-intro -->
 117
 118                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 119                                 <div id="step-1a" class="step">
 120                                         <div class="sidebar">
 121                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1a-install-wizard.png" alt="Step 1.A: Install Wizard" /></p>
 122                                         </div><!-- /.sidebar -->
 123                                         <div class="main">
 124                                                 <h3><em>Step 1.a</em> Setup your email program with your email account</h3>
 125                                                 <p>Open your email program and follow the wizard (step-by-step walkthrough) that sets it up with your email account. Look for the letters SSL, TLS, or STARTTLS to the right of the servers when you're setting up your account. If you don't see them, you will still be able to use encryption, but this means that the people running your email system are running behind the industry standard in protecting your security and privacy. We recommend that you send them a friendly email asking them to enable SSL, TLS, or STARTTLS for your email server. They will know what you're talking about, so it's worth making the request even if you aren't an expert on these security systems.</p>
 126
 127                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 128                                                 <div class="troubleshooting">
 129                                                         <h4>Troubleshooting</h4>
 130                                                         <dl>
 131                                                                 <dt>The wizard doesn't launch</dt>
 132                                                                         <dd>You can launch the wizard yourself, but the menu option for doing so is named differently in each email program. The button to launch it will be in the program's main menu, under "New" or something similar, titled something like "Add account" or "New/Existing email account."</dd>
 133                                                                 <dt>The wizard can't find my account or isn't downloading my mail</dt>
 134                                                                         <dd>Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.</dd>
 135                                                                 <dt class="feedback">Don't see a solution to your problem?</dt>
 136                                                                         <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
 137                                                         </dl>
 138                                                 </div><!-- /.troubleshooting -->
 139
 140                                         </div><!-- End .main -->
 141                                 </div><!-- End #step1-a .step -->
 142
 143                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 144                                 <div id="step-1b" class="step">
 145                                         <div class="sidebar">
 146                                                 <ul class="images">
 147                                                         <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-01-tools-addons.png" alt="Step 1.B: Tools -> Add-ons" /></li>
 148                                                         <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-02-search.png" alt="Step 1.B: Search Add-ons" /></li>
 149                                                         <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-03-install.png" alt="Step 1.B: Install Add-ons" /></li>
 150                                                 </ul>
 151                                         </div><!-- /.sidebar -->
 152                                         <div class="main">
 153                                                 <h3><em>Step 1.b</em> Install the Enigmail plugin for your email program</h3>
 154                                                 <p>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.</p>
 155                                                 <p>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.</p>
 156                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 157                                                 <div class="troubleshooting">
 158                                                         <h4>Troubleshooting</h4>
 159                                                         <dl>
 160                                                                 <dt>I can't find the menu.</dt>
 161                                                                         <dd>In many new email programs, the main menu is represented by an image of three stacked horizontal bars.</dd>
 162                                                                 <dt>My email looks weird</dt>
 163                                                                         <dd>Enigmail doesn't tend to play nice with HTML, which is used to format emails. To send an HTML-formatted email without encryption and or a signature, hold down the Shift key when you select compose. You can then write an email as if Enigmail wasn't there.</dd>
 164
 165                                                                 <dt class="feedback">Don't see a solution to your problem?</dt>
 166                                                                         <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
 167                                                         </dl>
 168                                                 </div><!-- /.troubleshooting -->
 169                                         </div><!-- End .main -->
 170                                 </div><!-- End #step-1b .step -->
 171
 172                         </div>
 173                 </section><!-- End #section1 -->
 174
 175 <!-- ~~~~~~~~~ Section 2: Make your keys  ~~~~~~~~~ -->
 176                 <section class="row" id="section2">
 177                         <div>
 178                                         <!-- ~~~~~~~~~ section introduction: interspersed text  ~~~~~~~~~ -->
 179                                 <div class="section-intro">
 180                                         <h2><em>#2</em> Make your keys</h2>
 181                                                 <p>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.</p>
 182
 183                                                 <p>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 a phonebook; people who want to send you encrypted email can look up your public key.</p>
 184
 185                                                 <p>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 descramble encrypted emails other people send to you.</p>
 186                                                 <p>In addition to encryption and decryption, you can also use these keys to sign messages and check the authenticity of other people's signatures. This process helps stop impersonators. We'll discuss this more in the next section.</p>
 187                                 </div><!-- End .section-intro -->
 188
 189                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 190                                 <div id="step-2a" class="step">
 191                                         <div class="sidebar">
 192                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step2a-01-make-keypair.png" alt="Step 2.A: Make a Keypair" /></p>
 193                                         </div><!-- /.sidebar -->
 194                                         <div class="main">
 195                                                 <h3><em>Step 2.a</em> Make a keypair</h3>
 196                                                 <p>The Enigmail Setup wizard may start automatically. If it doesn't, select Enigmail &rarr; Setup Wizard from your email program's menu. 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. Click Next with the default options selected, except in these instances, which are listed in the order they appear:</p>
 197 <ul>
 198                                                 <li>On the screen titled "Encryption," select "Encrypt all of my messages by default, because privacy is critical to me."</li>
 199                                                 <li>On the screen titled "Signing," select "Don't sign my messages by default."</li>
 200                                                 <li>On the screen titled "Key Selection," select "I want to create a new key pair for signing and encrypting my email."</li>
 201                                                 <li>On the screen titled "Create Key," pick a strong password! We recommend the Diceware method, which creates passwords which are both strong and memorable. To use the Diceware method, you will need dice and this <a href="http://world.std.com/~reinhold/diceware.wordlist.asc">list of words</a>. Do not substitute computer dice for physical dice. Notice that each word on the word list corresponds to a unique five-digit number. Roll one die five times, or five dice once, then string the numbers on the dice dice together to create a five-digit number, and then look up the corresponding word.</li>
 202                                                 <li>Repeat this process until you have at least six words, separating each with a space and keeping them all lowercase. You'll end up with a password like "dog help people drive match ice." Don't rearrange or discard the words, because doing so makes the process much less secure.</li>
 203                                                         <li>Diceware passwords are hard to remember until you've typed them in a handful of times. Write down your password and keep it with you at all times until you've got it memorized. Then, destroy the piece of paper.</li>
 204                                                 <li>If you don't have dice, pick a password which is at least twelve characters long, and includes at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget your password, or all of this work will be wasted!</li>
 205 </ul>
 206                                         <p class="notes">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.</p>
 207                                                 <p><span style="font-weight: bold;">When the "Key Generation Completed" 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). This step is essential for your email self-defense, as you'll learn more about in <a href="#section5">Section 5</a>.</span></p>
 208
 209
 210                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 211                                                 <div class="troubleshooting">
 212                                                         <h4>Troubleshooting</h4>
 213                                                         <dl>
 214                                                                 <dt>I can't find the Enigmail menu.</dt>
 215                                                                         <dd>In many new email programs, the main menu is represented by an image of three stacked horizontal bars. Enigmail may be inside a section called Tools.</dd>
 216     <dt>The wizard says that it cannot find GnuPG.</dt>
 217
 218                                          <dd>Open whatever program you usually use for installing software, and search for GnuPG, then install it. Then restart the  Enigmail setup wizard by going to Enigmail &rarr; Setup Wizard.</dd>
 219                                                                 <dt>More resources</dt>
 220                                                                         <dd>If you're having trouble with our instructions or just want to learn more, check out <a href="https://enigmail.wiki/Key_Management#Generating_your_own_key_pair">Enigmail's wiki instructions for key generation</a>.</dd>
 221
 222
 223
 224                                                                 <dt class="feedback">Don't see a solution to your problem?</dt>
 225                                                                         <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
 226                                                         </dl>
 227                                                 </div><!-- /.troubleshooting -->
 228                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 229
 230                                                 <div class="troubleshooting">
 231                                                         <h4>Advanced</h4>
 232                                                         <dl>
 233
 234
 235                                                                 <dt>Command line key generation</dt>
 236                                                                         <dd>If you prefer using the command line for a higher degree of control, you can follow the documentation from <a href="https://www.gnupg.org/gph/en/manual/c14.html#AEN25">The GNU Privacy Handbook</a>. Make sure you stick with "RSA and RSA" (the default), because it's newer and more secure than the algorithms the documentation recommendeds. Also make sure your key is at least 2048 bits, or 4096 if you really want to be secure.</dd>
 237
 238                                                                 <dt>Advanced key pairs</dt>
 239                                                                         <dd>When GnuPG creates a new keypair, it compartmentalizes the encryption function from the signing function through <a href="https://wiki.debian.org/Subkeys">subkeys</a>. If you use subkeys carefully, you can keep your GnuPG identity much more secure and recover from a compromised key much more quickly. <a href="https://alexcabal.com/creating-the-perfect-gpg-keypair/">Alex Cabal</a> and <a href="http://keyring.debian.org/creating-key.html">the Debian wiki</a> provide good guides for setting up a secure subkey configuration.</dd>
 240                                                         </dl>
 241                                                 </div><!-- /.troubleshooting -->
 242                                         </div><!-- End .main -->
 243                                 </div><!-- End #step-2a .step  -->
 244
 245
 246
 247                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 248                                 <div id="step-2b" class="step">
 249                                         <div class="main">
 250                                                 <h3><em>Step 2.b</em> Upload your public key to a keyserver</h3>
 251                                                 <p>In your email program's menu, select Enigmail &rarr; Key Management.</p>
 252 <p>Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.</p>
 253 <p class="notes">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.</p>
 254                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 255                                                 <div class="troubleshooting">
 256                                                         <h4>Troubleshooting</h4>
 257                                                         <dl>
 258                                                                 <dt>The progress bar never finishes</dt>
 259                                                                                 <dd>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.</dd>
 260 <dt>My key doesnt appear in the list</dt>
 261                                                                                 <dd>Try checking "Display All Keys by Default."</dd>
 262                                                                 <dt>More documentation</dt>
 263                                                                                 <dd>If you're having trouble with our instructions or just want to learn more, check out <a href="https://www.enigmail.net/documentation/quickstart-ch2.php#id2533620">Enigmail's documentation</a>.</dd>
 264
 265                                                                 <dt class="feedback">Don't see a solution to your problem?</dt>
 266                                                                         <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
 267
 268                                                         </dl>
 269                                                 </div><!-- /.troubleshooting -->
 270
 271                                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 272                                                 <div class="troubleshooting">
 273                                                         <h4>Advanced</h4>
 274                                                         <dl>
 275                                                                 <dt>Uploading a key from the command line</dt>
 276                                                                                 <dd>You can also upload your keys to a keyserver through the <a href="https://help.ubuntu.com/community/GnuPrivacyGuardHowto#Uploading_the_key_to_Ubuntu_keyserver">command line</a>. <a href="https://sks-keyservers.net/overview-of-pools.php">The sks Web site</a> maintains a list highly interconnected keyservers. You can also <a href="https://www.gnupg.org/gph/en/manual/x56.html#AEN64">directly export your key</a> as a file on your computer.</dd>
 277
 278                                                         </dl>
 279                                                 </div><!-- /.troubleshooting -->
 280                                         </div><!-- End .main -->
 281                                 </div><!-- End #step-2b .step  -->
 282
 283                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 284                                 <div id="terminology" class="step">
 285                                         <div class="main">
 286                                                 <h3>GnuPG, OpenPGP, what?</h3>
 287                                                 <p>In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably. Technically, OpenPGP (Pretty Good Privacy) is the encryption standard, and GNU Privacy Guard (often shortened to GPG or GnuPG) is the program that implements the standard. Enigmail is a plug-in program for your email program that provides an interface for GnuPG.</p>
 288                                         </div><!-- End .main -->
 289                                 </div><!-- End #terminology.step-->
 290
 291
 292                         </div>
 293                 </section><!-- End #section2 -->
 294
 295 <!-- ~~~~~~~~~ Section 3: Try it out  ~~~~~~~~~ -->
 296                 <section class="row" id="section3">
 297                         <div>
 298                                         <!-- ~~~~~~~~~ section introduction: interspersed text  ~~~~~~~~~ -->
 299                                 <div class="section-intro">
 300                                                 <h2><em>#3</em> Try it out!</h2>
 301                                                 <p>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.</p>
 302
 303                                                 <!-- <p>NOTE: Edward is currently having some technical difficulties, so he may take a long time to respond, or not respond at all. We're sorry about this and we're working hard to fix it. Your key will still work even without testing with Edward.</p> -->
 304                                 </div><!-- End .section-intro -->
 305
 306                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 307                                 <div id="step-3a" class="step">
 308                                         <div class="sidebar">
 309                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section3-try-it-out.png" alt="Try it out." /></p>
 310                                         </div><!-- /.sidebar -->
 311                                         <div class="main">
 312                                                 <h3><em>Step 3.a</em> Send Edward your public key</h3>
 313                                                 <p>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 Enigmail &rarr; 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.</p>
 314
 315 <p>Address the message to edward-en@fsf.org. Put at least one word (whatever you want) in the subject and body of the email. Don't send yet.</p>
 316
 317 <p>There should be an icon of a yellow key in the bottom right of the composition window. This means that encryption is on, however, we want this first special message to Edward to be unencrypted. Click the key icon once to turn encryption off. The key should become grey, with a blue dot on it (to alert you that the setting has been changed from the default). Once encryption is off, hit Send.</p>
 318
 319 <p class="notes">It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the <a href="#section5">Use it Well</a> 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.</p>
 320
 321 <p>When you open Edward's reply, Enigmail may prompt you for your password before using your private key to decrypt it.</p>
 322                                         </div><!-- End .main -->
 323                                 </div><!-- End #step-3a .step -->
 324
 325                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 326                                 <div id="step-3b" class="step">
 327                                         <div class="main">
 328                                                         <h3><em>Step 3.b</em> Send a test encrypted email</h3>
 329                                                         <p>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.</p>
 330                                                         <p>The key in the top left of the window should be yellow, meaning encryption is on. This will be your default from now on.</p>
 331                                                         <p class="notes">Next to the key, you'll notice an icon of a pencil. We'll get to this in a moment.</p>
 332                                                         <p>Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."</p>
 333
 334                                                         <p>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.</p>
 335
 336                                                         <p>Now you are back at the "Recipients not valid, not trusted or not found" screen. Check the box in front of Edward's key and click Send.</p>
 337
 338 <p class="notes">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 can decrypt it.</p>
 339                                         <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 340                                                         <div class="troubleshooting">
 341                                                                 <h4>Troubleshooting</h4>
 342                                                                 <dl>
 343                                                                         <dt>Enigmail can't find Edward's key</dt>
 344                                                                                 <dd>Close the pop-ups that have appeared since you clicked Send. 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.</dd>
 345                                                                         <dt>Unscrambled messages in the Sent folder</dt>
 346                                                                                 <dd>Even though you can't decrypt messages encrypted to someone else's key, your email program will automatically save a copy encrypted to your public key, which you'll be able to view from the Sent folder like a normal email. This is normal, and it doesn't mean that your email was not sent encrypted.</dd>
 347                                                                         <dt>More resources</dt>
 348                                                                                 <dd>If you're still having trouble with our instructions or just want to learn more, check out <a href="https://enigmail.wiki/Signature_and_Encryption#Encrypting_a_message">Enigmail's wiki</a>.</dd>
 349                                                                 <dt class="feedback">Don't see a solution to your problem?</dt>
 350                                                                         <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
 351                                                                 </dl>
 352                                                         </div><!-- /.troubleshooting -->
 353
 354
 355                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 356                                                 <div class="troubleshooting">
 357                                                         <h4>Advanced</h4>
 358                                                         <dl>
 359                                                                 <dt>Encrypt messages from the command line</dt>
 360                                                                         <dd>You can also encrypt and decrypt messages and files form the <a href="https://www.gnupg.org/gph/en/manual/x110.html">command line</a>, if that's your preference. The option --armor makes the encrypted output appear in the regular character set.</dd>
 361                                                         </dl>
 362                                                 </div><!-- /.troubleshooting -->
 363
 364
 365                                                 </div><!-- End .main -->
 366                                         </div><!-- End #step-3b .step -->
 367
 368                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 369                                 <div id="step-headers_unencrypted" class="step">
 370                                         <div class="main">
 371                                                 <h3><em>Important:</em> Security tips</h3>
 372                                                 <p>Even if you encrypt 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 a surveillance system can still figure out who you're communicating with. Also, surveillance agents will know that you're using GnuPG, even if they can't figure out what you're saying. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.</p>
 373                                                 <p>Encryption only works when you use it, so it's a good habit to double-check that email encryption is turned on before you hit send.</p>
 374
 375                                         </div><!-- End .main -->
 376                                 </div><!-- End #step-headers_unencrypted .step-->
 377
 378
 379                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 380                                 <div id="step-3c" class="step">
 381                                         <div class="main">
 382                                                 <h3><em>Step 3.c</em> Receive a response</h3>
 383                                                 <p>When Edward receives your email, he will use his private key to decrypt it, then use your public key (which you sent him in <a href="#step-3a">Step 3.A</a>) to encrypt his reply to you.</p>
 384
 385                                                 <p class="notes">It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the <a href="#section5">Use it Well</a> section of this guide.</p>
 386                                                 <p>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.</p>
 387                                                 <p>Notice the bar that Enigmail shows you above the message, with information about the status of Edward's key.</p>
 388                                         </div><!-- End .main -->
 389                                 </div><!-- End #step-3c .step -->
 390
 391
 392                                 <div id="step-3d" class="step">
 393                                         <div class="main">
 394                                                 <h3><em>Step 3.d</em> Send a test signed email to a friend</h3>
 395                                                 <p>GnuPG includes a way for you to sign messages and files, verifying that they came from you and that they weren't tampered with along the way. These signatures are stronger than their pen-and-paper cousins -- they're impossible to forge, because they're impossible to create without your private key (another reason to keep your private key safe).</p>
 396
 397                                                 <p>You can sign messages to anyone (including people who haven't created their own keypair!) so it's a great way to promote GnuPG. To sign an email to a friend, click the pencil icon next to the lock icon so that it turns gold. If you sign a message, Enigmail will ask you for your password before it sends the message off. It will do this every time it needs to use your private key.</p>
 398
 399                                                 <p>When the pencil is gold but the lock is grey, the email will be signed but not encrypted. When the pencil is grey and the lock is gold, the email will be encrypted but not signed. When they're both gold, the email will be signed and encrypted.</p>
 400                                         </div>
 401                                 </div>
 402                         </div>
 403                 </section>
 404
 405
 406 <!-- ~~~~~~~~~ Section 4: Learn the Web of Trust  ~~~~~~~~~ -->
 407                 <section class="row" id="section4">
 408                         <div>
 409                                         <!-- ~~~~~~~~~ section introduction: interspersed text  ~~~~~~~~~ -->
 410                                 <div class="section-intro">
 411                                                 <h2><em>#4</em> Learn the Web of Trust</h2>
 412                                                 <p>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.</p>
 413
 414 <p>When you sign someone's key, you are publicly saying that you've verified that it belongs to them and not an impostor. Signing keys and messages is the same type mathematical operation, but they carry very different implications. It's a good practice to generally sign your email, but if you casually sign people's keys, you may accidently end up vouching for the identity of an imposter!</p>
 415
 416 <p>People who use your public key can see who has signed it. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is a constellation of GnuPG users, connected to each other by chains of trust expressed through signatures. The more signatures of people you trust a key has, the more trustworthy that key is.</p>
 417
 418
 419
 420                                 </div><!-- End .section-intro -->
 421
 422                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 423                                 <div id="step-4a" class="step">
 424                                         <div class="sidebar">
 425                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section4-web-of-trust.png" alt="Section 4: Web of Trust" /></p>
 426                                         </div><!-- /.sidebar -->
 427                                         <div class="main">
 428                                                 <h3><em>Step 4.a</em> Sign a key</h3>
 429                                                 <p>In your email program's menu, go to Enigmail &rarr; Key Management.</p>
 430                                                 <p>Right click on Edward's public key and select Sign Key from the context menu.</p>
 431                                                 <p>In the window that pops up, select "I will not answer" and click ok.</p>
 432                                                 <p>Now you should be back at the Key Management menu. Select Keyserver &rarr; Upload Public Keys and hit ok.</p>
 433                                                 <p class="notes">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.</p>
 434
 435
 436                                                 <!--<div id="pgp-pathfinder">
 437                                                         <form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi" method="get">
 438                                                                 <p><strong>From:</strong> <input type="text" placeholder="xD41A008"  name="FROM"></p>
 439                                                                 <p><strong>To:</strong> <input type="text" placeholder="50BD01x4" name="TO"></p>
 440                                                                 <p class="buttons"><input type="submit" value="trust paths" name="PATHS"> <input type="reset" value="reset" name=".reset"></p>
 441                                                         </form>
 442                                                 </div>End #pgp-pathfinder -->
 443
 444                                         </div><!-- End .main -->
 445                                 </div><!-- End #step-4a .step -->
 446
 447                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 448                                 <div id="step-sign_real_keys" class="step">
 449                                         <div class="main">
 450                                                 <h3>Identifying keys: Fingerprints and IDs</h3>
 451                                                 <p>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 Enigmail &rarr; 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.</p>
 452
 453 <p class="notes">You may also see public keys referred to by their key ID, which is simply the last eight 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 you are trying to communicate to verify which one to use.</p>
 454
 455                                         </div><!-- End .main -->
 456                                 </div><!-- End #step-sign_real_keys .step-->
 457
 458                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 459                                 <div id="check-ids-before-signing" class="step">
 460                                         <div class="main">
 461                                                 <h3><em>Important:</em> check people's identification before signing their keys</h3>
 462                                                 <p>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?".</p>
 463
 464                                 <!-- ~~~~~~~~~ Troubleshooting  ~~~~~~~~~ -->
 465                                                 <div class="troubleshooting">
 466                                                         <h4>Advanced</h4>
 467                                                         <dl>
 468                                                                 <dt>Master the Web of Trust</dt>
 469                                                                        <dd>Unfortunately, trust does not spread between users the way <a href="http://fennetic.net/irc/finney.org/~hal/web_of_trust.html">many people think</a>. One of best ways to strengthen the GnuPG community is to properly <a href="https://www.gnupg.org/gph/en/manual/x334.html">understand</a> the web of trust and to carefully sign as many people's keys as <a href="http://www.cryptnet.net/fdp/crypto/keysigning_party/en/keysigning_party.html">circumstances</a> permit.</dd>
 470                                                                 <dt>Set ownertrust</dt>
 471                                                                         <dd>If you trust someone enough to validate other people's keys, you can assign them an ownertrust level through Enigmails's key management window. Right click on the other person's key, go to the "Select Owner Trust" menu option, select the trustlevel and click OK. Only do this once you've read and understand "Master the Web of Trust" above.</dd>
 472                                                         </dl>
 473                                                 </div><!-- /.troubleshooting -->
 474                                         </div><!-- End .main -->
 475
 476                                 </div><!-- End #step-sign_real_keys .step-->
 477
 478
 479                         </div>
 480                 </section><!-- End #section4 -->
 481
 482 <!-- ~~~~~~~~~ Section 5: Use it well  ~~~~~~~~~ -->
 483                 <section id="section5" class="row">
 484                         <div>
 485                                         <!-- ~~~~~~~~~ section introduction: interspersed text  ~~~~~~~~~ -->
 486                                 <div class="section-intro">
 487                                                 <h2><em>#5</em> Use it well</h2>
 488 <p>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.</p>
 489                                 </div><!-- End .section-intro -->
 490
 491                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 492                                 <div id="step-5a" class="step">
 493                                         <div class="sidebar">
 494                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section5-01-use-it-well.png" alt="Section 5: Use it Well" /></p>
 495                                         </div><!-- /.sidebar -->
 496                                         <div class="main">
 497                                                 <h3>When should I encrypt?</h3>
 498
 499                                                 <p>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.</p>
 500
 501 <p>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.</p>
 502
 503                                         </div><!-- End .main -->
 504                                 </div><!-- End #step-5a .step -->
 505
 506                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 507                                 <div id="step-5b" class="step">
 508                                         <div class="sidebar">
 509                                                 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section5-02-use-it-well.png" alt="Section 5: Use it Well" /></p>
 510                                         </div><!-- /.sidebar -->
 511                                         <div class="main">
 512                                                 <h3>Be wary of invalid keys</h3>
 513                                                 <p>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.</p>
 514                                                 <p>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 Enigmail at the top, which most likely says "Enigmail: Part of this message encrypted."</p>
 515 <p><b>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.</b></p>
 516                                         </div><!-- End .main -->
 517                                 </div><!-- End #step-5b .step -->
 518
 519                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 520                                 <div id="step-5c" class="step">
 521                                         <div class="main">
 522                                                 <h3>Copy your revocation certificate to somewhere safe</h3>
 523                                                 <p>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.</p>
 524 <p>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.</p>
 525                                         </div><!-- End .main -->
 526                                 </div><!-- End #step-5c .step -->
 527
 528                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 529                                 <div id="step-lost_key" class="step">
 530                                         <div class="main">
 531                                                 <h3><em>Important:</em> act swiftly if someone gets your private key</h3>
 532                                                 <p>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 or forge your signature. This guide doesn't cover how to revoke a key, but you can follow the <a href="https://www.gnupg.org/gph/en/manual.html#AEN305">instructions on the GnuPG site</a>. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.</p>
 533                                         </div><!-- End .main -->
 534                                 </div><!-- End #step-lost_key .step-->
 535
 536
 537                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~ -->
 538                                 <div id="webmail-and-GnuPG" class="step">
 539                                         <div class="main">
 540                                                 <h3>Webmail and GnuPG</h3>
 541                                                 <p>When you use a web browser to access your email, you're using webmail, an email program stored on a distant website. Unlike webmail, your desktop email program runs on your own computer. Although webmail can't decrypt encrypted email, it will still display it in its encrypted form. If you primarily use webmail, you'll know to open your email client when you receive a scrambled email.</p>
 542                                         </div><!-- End .main -->
 543                                 </div><!-- End #step-lost_key .step-->
 544
 545                                 <!-- ~~~~~~~~~ a div for each step  ~~~~~~~~~
 546                                 <div id="step-5d" class="step">
 547                                         <div class="main">
 548                                                 <h3>Make your public key part of your online identity</h3>
 549                                                 <p> First add your public key fingerprint to your email signature, then compose an email to at least five of your friends, telling them you just set up GnuPG and mentioning your public key fingerprint. Link to this guide and ask them to join you. Don't forget that there's also an awesome <a href="infographic.html">infographic to share.</a></p>
 550
 551 <p class="notes">Start writing your public key fingerprint anywhere someone would see your email address: your social media profiles, blog, Website, or business card. (At the Free Software Foundation, we put ours on our <a href="https://fsf.org/about/staff">staff page</a>.) 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.</p>
 552                                         </div><!-- End .main
 553                                 </div> End #step-5d .step-->
 554
 555
 556                         </div>
 557                 </section><!-- End #section5 -->
 558
 559
 560
 561 <!-- ~~~~~~~~~ Section 6: Next steps  ~~~~~~~~~ -->
 562                 <section class="row" id="section6">
 563                         <div id="step-click_here" class="step">
 564                                         <div class="main">
 565                                           <h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
 566
 567                                         </div><!-- End .main -->
 568                                 </div><!-- End #step-click_here .step-->
 569
 570                 </section><!-- End #section6 -->
 571
 572 <!-- ~~~~~~~~~ FAQ  ~~~~~~~~~ -->
 573 <!-- When un-commenting this section go to main.css and search
 574                 for /* Guide Sections Background */ then add #faq to the desired color
 575
 576                 <section class="row" id="faq">
 577                         <div>
 578                                 <div class="sidebar">
 579                                         <h2>FAQ</h2>
 580                                 </div>
 581
 582                                 <div class="main">
 583                                         <dl>
 584                                                 <dt>My key expired</dt>
 585                                                         <dd>Answer coming soon.</dd>
 586
 587                                                 <dt>Who can read encrypted messages? Who can read signed ones?</dt>
 588                                                         <dd>Answer coming soon.</dd>
 589
 590                                                 <dt>My email program is opening at times I don't want it to open/is now my default program and I don't want it to be.</dt>
 591                                                         <dd>Answer coming soon.</dd>
 592                                         </dl>
 593                                 </div>
 594                         </div>
 595                 </section> --><!-- End #faq -->
 596
 597 <!-- ~~~~~~~~~ Footer  ~~~~~~~~~ -->
 598                 <footer class="row" id="footer">
 599                         <div>
 600                                 <div id="copyright">
 601                                         <h4><a href="https://u.fsf.org/ys"><img alt="Free Software Foundation" src="//static.fsf.org/nosvn/enc-dev0/img/fsf-logo.png" /></a></h4>
 602                                         <p>Copyright &copy; 2014-2015 <a href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. <a href="https://u.fsf.org/yr">Join.</a></p>
 603                                         <p><em><a href="http://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">Source code of Edward reply bot by Josh Drake &lt;zamnedix@gnu.org&gt; available under the GNU General Public License.</a></em></p>
 604 <p>The images on this page are under a <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 license (or later version)</a>, and the rest of it is under a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons Attribution-ShareAlike 4.0 license (or later version)</a>. &mdash; <a href="http://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these licenses?</a></p>
 605                                         <p>Download the source package for <a href="emailselfdefense_source.zip">this guide</a>. Fonts used in the guide &amp; infographic: <a href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo Impallari, <a href="http://www.google.com/fonts/specimen/Signika">Signika</a> by Anna Giedry&#347;, <a href="http://www.google.com/fonts/specimen/Archivo+Narrow">Archivo Narrow</a> by Omnibus-Type, <a href="http://www.thegopherarchive.com/gopher-files-hacks-pxl2000-119351.htm">PXL-2000</a> by Florian Cramer.</p>
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