Changed password to passphrase so that it is consistent and changed code to command
[enc.git] / en / index.html
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1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta http-equiv="content-type" content="text/html; charset=utf-8" />
5<title>Email Self-Defense - a guide to fighting surveillance with GnuPG
6encryption</title>
7<meta name="keywords" content="GnuPG, GPG, openpgp, surveillance, privacy,
013b81e2 8email, security, GnuPG2, encryption" />
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9<meta name="description" content="Email surveillance violates our fundamental
10rights and makes free speech risky. This guide will teach you email
11self-defense in 40 minutes with GnuPG." />
12<meta name="viewport" content="width=device-width, initial-scale=1" />
13<link rel="stylesheet" href="../static/css/main.css" />
14<link rel="shortcut icon"
15href="../static/img/favicon.ico" />
16</head>
e4266c81 17<body>
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18<!--<div style="text-align: center; padding: 2.5px; background-color: #a94442; color:#fcf8e3;"><p>Due to Enigmail's PGP functionality being migrated into Icedove and Thunderbird, steps 2 and 3 of the guide are currently out of date.</p><p> Thank you for your patience while we're working on a new round of updates.</p></div>-->
19
20<!-- PLACE FUNDRAISER MODAL WINDOW HERE -->
21
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22<!-- ~~~~~~~~~ GnuPG Header and introduction text ~~~~~~~~~ -->
23<header class="row" id="header"><div>
24
25
26<h1>Email Self-Defense</h1>
27
28<!-- Language list for browsers that do not have JS enabled -->
29<ul id="languages" class="os">
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30<li><strong><a href="https://libreplanet.org/wiki/GPG_guide/Translation_Guide">
31Translate!</a></strong></li>
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32</ul>
33
34<ul id="menu" class="os">
35<li class="spacer"><a href="index.html" class="current">Set up guide</a></li>
36<!--<li><a href="mac.html">Mac OS</a></li>-->
37<!--<li><a href="windows.html">Windows</a></li>-->
38<li class="spacer"><a href="workshops.html">Teach your friends</a></li>
39<li class="spacer"><a
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40href="http://hhldo3tnt5solzj2bwfvh7xm4slk2forpjwjyemhcfrlob5gq75gioid.onion/en"
41target="_blank">This site's tor onion service</a></li>
42<li class="spacer"><a
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43href="https://fsf.org/share?u=https://u.fsf.org/zb&amp;t=Email%20encryption%20for%20everyone%20via%20%40fsf">
44Share&nbsp;
45<img src="../static/img/gnu-social.png" class="share-logo"
46alt="[GNU Social]" />&nbsp;
47<img src="../static/img/mastodon.png" class="share-logo"
48alt="[Mastodon]" />&nbsp;
49<img src="../static/img/reddit-alien.png" class="share-logo"
50alt="[Reddit]" />&nbsp;
51<img src="../static/img/hacker-news.png" class="share-logo"
52alt="[Hacker News]" /></a></li>
53</ul>
54
55<!-- ~~~~~~~~~ FSF Introduction ~~~~~~~~~ -->
56<div id="fsf-intro">
57
58<h3><a href="https://u.fsf.org/ys"><img
59alt="Free Software Foundation"
60src="../static/img/fsf-logo.png" />
61</a></h3>
62
63<div class="fsf-emphasis">
64
65<p>We fight for computer users' rights, and promote the development of free (as
66in freedom) software. Resisting bulk surveillance is very important to us.</p>
67
68<p><strong>Please donate to support Email Self-Defense. We need to keep
69improving it, and making more materials, for the benefit of people around
70the world taking the first step towards protecting their privacy.</strong></p>
71
72</div>
73
7aa588bf 74<div style="text-align: center;">
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75<p><a href="https://crm.fsf.org/civicrm/contribute/transact?reset=1&amp;id=14&amp;mtm_campaign=email_self_defense&amp;mtm_kwd=guide_donate"><img alt="Donate" src="../static/img/en/donate.png" /></a></p>
76
7aa588bf 77<h5>Sign up</h5>
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78<form action="https://my.fsf.org/civicrm/profile/create?reset=1&amp;gid=31" method="post">
79<p>Enter your email address to receive our monthly newsletter, the<br /><a href="https://www.fsf.org/free-software-supporter/">Free Software Supporter</a></p>
7aa588bf 80
81<p><input id="frmEmail" type="text" name="email-Primary" size="18" maxlength="80" /></p>
82<p><input type="submit" name="_qf_Edit_next" value="Subscribe me" /></p>
83<div><input name="postURL" type="hidden" value="" />
84<input type="hidden" name="group[25]" value="1" />
fc191c8e 85<input name="cancelURL" type="hidden" value="https://my.fsf.org/civicrm/profile?reset=1&amp;gid=31" />
7aa588bf 86<input name="_qf_default" type="hidden" value="Edit:cancel" />
87</div>
88</form></div>
89
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90</div><!-- End #fsf-intro -->
91
92<!-- ~~~~~~~~~ Guide Introduction ~~~~~~~~~ -->
93<div class="intro">
94
95<p><a id="infographic" href="infographic.html"><img
96src="../static/img/en/infographic-button.png"
97alt="View &amp; share our infographic &rarr;" /></a>
98Bulk surveillance violates our fundamental rights and makes free speech
99risky. This guide will teach you a basic surveillance self-defense skill: email
100encryption. Once you've finished, you'll be able to send and receive emails
101that are scrambled to make sure a surveillance agent or thief intercepting
102your email can't read them. All you need is a computer with an Internet
103connection, an email account, and about forty minutes.</p>
104
105<p>Even if you have nothing to hide, using encryption helps protect the privacy
106of people you communicate with, and makes life difficult for bulk surveillance
107systems. If you do have something important to hide, you're in good company;
108these are the same tools that whistleblowers use to protect their identities
109while shining light on human rights abuses, corruption, and other crimes.</p>
110
111<p>In addition to using encryption, standing up
112to surveillance requires fighting politically for a <a
113href="https://gnu.org/philosophy/surveillance-vs-democracy.html">reduction
114in the amount of data collected on us</a>, but the essential first step is
115to protect yourself and make surveillance of your communication as difficult
116as possible. This guide helps you do that. It is designed for beginners, but
117if you already know the basics of GnuPG or are an experienced free software
118user, you'll enjoy the advanced tips and the <a href="workshops.html">guide
119to teaching your friends</a>.</p>
120
121</div><!-- End .intro -->
122</div></header><!-- End #header -->
123
124<!-- ~~~~~~~~~ Section 1: Get the pieces ~~~~~~~~~ -->
125<section class="row" id="section1"><div>
126
127<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
128<div class="section-intro">
129
130<h2><em>#1</em> Get the pieces</h2>
131
132<p class="notes">This guide relies on software which is <a
133href="https://www.gnu.org/philosophy/free-sw.html">freely licensed</a>;
134it's completely transparent and anyone can copy it or make their
135own version. This makes it safer from surveillance than proprietary
136software (like Windows or macOS). Learn more about free software at <a
137href="https://u.fsf.org/ys">fsf.org</a>.</p>
138
572e3d5f 139<p>Most GNU/Linux operating systems come with GnuPG installed on them, so if you're running one of these systems, you don't have to download it. If you're running macOS or Windows, steps to download GnuPG are below. Before configuring your encryption setup with this guide, though, you'll need a desktop email program installed on your computer. Many GNU/Linux distributions have one installed already, such as Icedove, which may be under the alternate name "Thunderbird." Programs like these are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.</p>
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141</div><!-- End .section-intro -->
142
143<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
144<div id="step-1a" class="step">
145<div class="sidebar">
146
7b371af8 147<p class="large"><img
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148src="../static/img/en/screenshots/step1a-install-wizard.png"
149alt="Step 1.A: Install Wizard" /></p>
150
151</div><!-- /.sidebar -->
152<div class="main">
153
154<h3><em>Step 1.a</em> Set up your email program with your email account</h3>
155
156<p>Open your email program and follow the wizard (step-by-step walkthrough)
157that sets it up with your email account. This usually starts from "Account Settings" &rarr; "Add Mail Account". You should get the email server settings from your systems administrator or the help section of your email account.</p>
df371bd3 158
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159
160<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
161<div class="troubleshooting">
162
163<h4>Troubleshooting</h4>
164
165<dl>
166<dt>The wizard doesn't launch</dt>
167<dd>You can launch the wizard yourself, but the menu option for doing so is
168named differently in each email program. The button to launch it will be in
169the program's main menu, under "New" or something similar, titled something
170like "Add account" or "New/Existing email account."</dd>
171
172<dt>The wizard can't find my account or isn't downloading my mail</dt>
173<dd>Before searching the Web, we recommend you start by asking other people
174who use your email system, to figure out the correct settings.</dd>
175
176<dt>I can't find the menu</dt>
177<dd>In many new email programs, the main menu is represented by an image of
178three stacked horizontal bars.</dd>
179
180<dt class="feedback">Don't see a solution to your problem?</dt>
181<dd class="feedback">Please let us know on the <a
182href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
183page</a>.</dd>
184</dl>
185
186</div><!-- /.troubleshooting -->
187</div><!-- End .main -->
188</div><!-- End #step1-a .step -->
189
190<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
191<div id="step-1b" class="step">
192<div class="main">
193
98681fc5 194<h3><em>Step 1.b</em> Install GnuPG</h3>
a6ffc443 195
98681fc5 196<p>If you are using a GNU/Linux machine, you should already have GnuPG installed, and you can skip to <a href="#section2">Section 2</a>.</p>
a062f9ca 197
98681fc5 198<p>If you are using a macOS or Windows machine, however, you need to first install the GnuPG program. Select your operating system below and follow the instructions. For the rest of this guide, the steps are the same for all operating systems. </p>
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199
200<!-- ~~~~~~~~~ MACOS ~~~~~~~~~ -->
201<div class="troubleshooting">
202
013b81e2 203<h4>macOS</h4>
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204
205<dl>
206<dt>Use a third-party package manager to install GnuPG</dt>
98681fc5 207<dd>
97b7b361 208<p>The default macOS package manager makes it difficult to install GnuPG and other pieces of free software (like Emacs, GIMP, or Inkscape). To make things easier, we recommend setting up the third-party package manager "Homebrew" to install GnuPG. For this, we will use a program called "Terminal," which is pre-installed on macOS.</p>
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209
210<p># Copy the first command on the home page of <a href="https://brew.sh/">Homebrew</a> by clicking on the clipboard icon, and paste it in Terminal. Click "Enter" and wait for the installation to finalize.</p>
211<p># Then install GnuPG by entering the following code in Terminal:<br/>
212<code>brew install gnupg gnupg2</code></p>
213</dd>
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214</dl>
215
216</div><!-- /.troubleshooting -->
217
218<!-- ~~~~~~~~~ WINDOWS ~~~~~~~~~ -->
219<div class="troubleshooting">
220
221<h4>Windows</h4>
222
223<dl>
224<dt>Get GnuPG by downloading GPG4Win</dt>
625cf53d 225<dd><p><a href="https://www.gpg4win.org/">GPG4Win</a> is an email and file encryption software package that includes GnuPG. Download and install the latest version, choosing default options whenever asked. After it's installed, you can close any windows that it creates.</p>
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226</dd>
227</dl>
228
229</div><!-- /.troubleshooting -->
230</div><!-- End .main -->
231</div><!-- End #step1-b .step -->
232
233<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
234<div id="terminology" class="step">
235<div class="main">
236
237<h3>GnuPG, OpenPGP, what?</h3>
238
239<p>In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP
240are used interchangeably. Technically, OpenPGP (Pretty Good Privacy) is the
241encryption standard, and GNU Privacy Guard (often shortened to GPG or GnuPG)
242is the program that implements the standard. Most email programs provide an interface for GnuPG. There is also a newer version of GnuPG, called GnuPG2.</p>
243
244</div><!-- End .main -->
245</div><!-- End #terminology.step-->
246
247</div></section><!-- End #section1 -->
248
249<!-- ~~~~~~~~~ Section 2: Make your keys ~~~~~~~~~ -->
250<section id="section2" class="row"><div>
251
252<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
253<div class="section-intro">
254
255<h2><em>#2</em> Make your keys</h2>
7b371af8 256<p class="float medium"><img src="../static/img/en/screenshots/step2a-01-make-keypair.png" alt="A robot with a head shaped like a key holding a private and a public key"/></p>
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257
258<p>To use the GnuPG system, you'll need a public key and a private key (known
259together as a keypair). Each is a long string of randomly generated numbers
260and letters that are unique to you. Your public and private keys are linked
261together by a special mathematical function.</p>
262
263<p>Your public key isn't like a physical key, because it's stored in the open
264in an online directory called a keyserver. People download it and use it,
265along with GnuPG, to encrypt emails they send to you. You can think of the
266keyserver as a phonebook; people who want to send you encrypted email can
267look up your public key.</p>
268
269<p>Your private key is more like a physical key, because you keep it to
270yourself (on your computer). You use GnuPG and your private key together to
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271descramble encrypted emails other people send to you. <strong>You should never share your private key with anyone, under any
272circumstances.</strong></p>
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273
274<p>In addition to encryption and decryption, you can also use these keys to
275sign messages and check the authenticity of other people's signatures. We'll
276discuss this more in the next section.</p>
277
278</div><!-- End .section-intro -->
279
280<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
281<div id="step-2a" class="step">
282<div class="sidebar">
7b371af8 283<p class="large"><img
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284src="../static/img/en/screenshots/step2a-02-make-keypair.png"
285alt="Step 2.A: Make your Keypair" /></p>
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286
287<p class="large"><img
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288src="../static/img/en/screenshots/step2a-03-make-keypair.png"
289alt="Step 2.A: Set your passphrase" /></p>
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290
291</div><!-- /.sidebar -->
292<div class="main">
293
294<h3><em>Step 2.a</em> Make a keypair</h3>
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295
296<h4>Make your keypair</h4>
a6ffc443 297
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298<p>We will use the command line in a terminal to create a keypair using the
299GnuPG program.</p>
a6ffc443 300
a062f9ca 301<p class="notes">Whether on GNU/Linux, macOS or Windows, you can launch your
98681fc5 302terminal ("Terminal" in macOS, "PowerShell" in Windows) from the Applications
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303menu (some GNU/Linux systems respond to the <kbd>Ctrl + Alt + T</kbd>
304shortcut).</p>
b9a7f2fa 305
3fbfca2a 306<p># Enter <code>gpg --full-generate-key</code> to start the process.</p>
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307<p># To answer what kind of key you would like to create, select the default option: <samp>1&nbsp;RSA&nbsp;and&nbsp;RSA</samp>.</p>
308<p># Enter the following keysize: <code>4096</code> for a strong key.</p>
b9a7f2fa 309<p># Choose the expiration date; we suggest <code>2y</code> (2 years).</p>
a6ffc443 310<p>Follow the prompts to continue setting up with your personal details.</p>
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311<p class="notes"> Depending on your version of GPG, you may need to use
312<code>--gen-key</code> instead of <code>--full-generate-key</code>&#65279;.</p>
a6ffc443 313
df371bd3 314<h4>Set your passphrase</h4>
8ea69a99 315<p>On the screen titled "Passphrase," pick a strong passphrase! You can
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316do it manually, or you can use the Diceware method. Doing it manually
317is faster but not as secure. Using Diceware takes longer and requires
8ea69a99 318dice, but creates a passphrase that is much harder for attackers to figure
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319out. To use it, read the section "Make a secure passphrase with Diceware" in <a
320href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">
321this article</a> by Micah Lee.</p>
322
323
324<p>If you'd like to pick a passphrase manually, come up with something
325you can remember which is at least twelve characters long, and includes
326at least one lower case and upper case letter and at least one number or
8ea69a99 327punctuation symbol. Never pick a passphrase you've used elsewhere. Don't use
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328any recognizable patterns, such as birthdays, telephone numbers, pets' names,
329song lyrics, quotes from books, and so on.</p>
330
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331<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
332<div class="troubleshooting">
333
334<h4>Troubleshooting</h4>
335<dl>
336<dt>GnuPG is not installed</dt>
337<dd>
a062f9ca 338You can check if this is the case with the command <code>gpg --version</code>&#65279;.
98681fc5 339If GnuPG is not installed, it will bring up the following result on most GNU/Linux operating systems, or something like it:
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340<samp>Command 'gpg' not found, but can be installed with:
341 sudo apt install gnupg</samp>. Follow that command and install the program.</dd>
a6ffc443 342
3fbfca2a 343<dt><i>gpg --full-generate-key</i> command not working</dt>
344<dd>Some distributions use a different version of GPG. When you receive an error code that is something along the lines of: <samp>gpg: Invalid option "--full-generate-key"</samp>, you can try the following commands: <br />
84f4c9ad 345<code>sudo apt update</code><br />
346<code>sudo apt install gnupg2</code><br />
3fbfca2a 347<code>gpg2 --full-generate-key</code><br />
348If this resolved the issue, you need to continue to use the gpg2 identifier instead of gpg throughout the following steps of the guide.
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349<p class="notes"> Depending on your version of GPG, you may need to use
350<code>--gen-key</code> instead of <code>--full-generate-key</code>&#65279;.</p>
3fbfca2a 351</dd>
2a32eee9 352
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353<dt>I took too long to create my passphrase</dt>
354<dd>That's okay. It's important to think about your passphrase. When you're ready, just follow the steps from the beginning again to create your key.</dd>
355
356<dt>How can I see my key?</dt>
357<dd>
98681fc5 358Use the following command to see all keys: <code>gpg --list-keys</code>&#65279;. Yours should be listed in there, and later, so will Edward's (<a href="#section3">Section 3</a>).<br />
a062f9ca 359If you want to see only your key, you can use <code>gpg --list-key [your@email]</code>&#65279;.<br />
df371bd3 360You can also use <code>gpg --list-secret-key</code> to see your own private key.</dd>
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361
362<dt>More resources</dt>
363<dd>For more information about this process, you can also refer to <a
364href="https://www.gnupg.org/gph/en/manual/c14.html#AEN25">The GNU Privacy
365Handbook</a>. Make sure you stick with "RSA and RSA" (the default),
366because it's newer and more secure than the algorithms the documentation
a062f9ca 367recommends. Also make sure your key is at least 4096&nbsp;bits if you
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368want to be secure.</dd>
369
370<dt class="feedback">Don't see a solution to your problem?</dt>
371<dd class="feedback">Please let us know on the <a
372href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
373page</a>.</dd>
374</dl>
375
376</div><!-- /.troubleshooting -->
377
378<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
379<div class="troubleshooting">
380
381<h4>Advanced</h4>
382<dl>
383<dt>Advanced key pairs</dt>
384<dd>When GnuPG creates a new keypair, it compartmentalizes
385the encryption function from the signing function through <a
386href="https://wiki.debian.org/Subkeys">subkeys</a>. If you use
387subkeys carefully, you can keep your GnuPG identity more
388secure and recover from a compromised key much more quickly. <a
389href="https://alexcabal.com/creating-the-perfect-gpg-keypair/">Alex Cabal</a>
390and <a href="https://keyring.debian.org/creating-key.html">the Debian wiki</a>
391provide good guides for setting up a secure subkey configuration.</dd>
5e3f938b 392</dl>
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393
394</div><!-- /.troubleshooting -->
395</div><!-- End .main -->
396</div><!-- End #step-2a .step -->
397
398<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
399<div id="step-2b" class="step">
400<div class="sidebar">
7b371af8 401<p class="large"><img
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402src="../static/img/en/screenshots/step2b-04-upload-and-certificate.png"
403alt="Step 2.B: Send to server and generate a certificate" /></p>
404
405</div><!-- /.sidebar -->
406<div class="main">
407
408<h3><em>Step 2.b</em> Some important steps following creation</h3>
409
df371bd3 410<h4>Upload your key to a keyserver</h4>
a6ffc443 411<p>We will upload your key to a keyserver, so if someone wants to send you an encrypted message, they can download your public key from the Internet. There are multiple keyservers
7168a8d7 412that you can select from the menu when you upload, but they are mostly all copies
413of each other. Any server will work, but it's good to remember which one you uploaded your key to originally. Also keep in mind, sometimes takes a few hours for them to match each other when a new key is uploaded.</p>
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414<p># Copy your keyID: <code>gpg --list-key [your@email]</code> will list your public ("pub") key information, including your keyID, which is a unique list of numbers and letters. Copy this keyID, so you can use it in the following command.</p>
415<p># Upload your key to a server:
416<code>gpg --send-key [keyID]</code></p>
a6ffc443 417
df371bd3 418<h4>Export your key to a file</h4>
00991279 419<p>Use the following command to export your secret key so you can import it into your email client at the next <a href="#section3">step</a>. To avoid getting your key compromised, store this in a safe place, and make sure that if it is transferred, it is done so in a trusted way. Exporting your keys can be done with the following commands:</p>
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420<p><code>
421$ gpg --export-secret-keys -a [keyID] > my_secret_key.asc<br/>
422$ gpg --export -a [keyID] > my_public_key.asc
423</code></p>
a6ffc443 424
df371bd3 425<h4>Generate a revocation certificate</h4>
98681fc5 426<p>Just in case you lose your key, or it gets compromised, you want to generate a certificate and choose to save it in a safe place on your computer for now (please refer to <a href="#step-6c">Step 6.C</a> for how to best store your revocation cerficate safely). This step is essential for your email self-defense, as you'll learn more about in <a href="#section5">Section 5</a>.</p>
a6ffc443 427
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428<p># Copy your keyID: <code>gpg --list-key [your@email]</code> will list your public ("pub") key information, including your keyID, which is a unique list of numbers and letters. Copy this keyID, so you can use it in the following command.</p>
429<p># Generate a revocation certificate: <code>gpg --gen-revoke --output revoke.asc [keyID]</code></p>
430<p># It will prompt you to give a reason for revocation, we recommend to use <samp>1&nbsp;=&nbsp;key has been compromised</samp>.</p>
a062f9ca 431<p># You don't have to fill in a reason, but you can; then press "Enter" for an empty line, and confirm your selection.</p>
a6ffc443 432
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433
434<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
435<div class="troubleshooting">
436
437<h4>Troubleshooting</h4>
438
439<dl>
84f4c9ad 440<dt>Sending my key to the keyserver is not working</dt>
f68b2d75 441<dd>Instead of using the general command to upload your key to the keyserver, you can use a more specific command and add the keyserver to your command <code>gpg --keyserver keys.openpgp.org --send-key [keyID]</code>&#65279;.</dd>
84f4c9ad 442
a6ffc443 443<dt>My key doesn't seem to be working or I get a "permission denied."</dt>
dfee0188 444<dd><p>Like every other file or folder, gpg keys are subject to permissions. If these are not set correctly, your system may not be accepting your keys. You can follow the next steps to check, and update to the right permissions.</p>
a6ffc443 445
df371bd3 446<p># Check your permissions: <code>ls -l ~/.gnupg/*</code></p>
dfee0188 447<p># Set permissions to read, write, execute for only yourself, no others. These are the recommended permissions for your folder. <br/>
8ea69a99 448You can use the command: <code>chmod 700 ~/.gnupg</code></p>
dfee0188 449<p># Set permissions to read and write for yourself only, no others. These are the recommended permissions for the keys inside your folder. <br/>
df371bd3 450You can use the code: <code>chmod 600 ~/.gnupg/*</code></p>
a6ffc443 451
dfee0188 452<p class="notes">If you have (for any reason) created your own folders inside ~/.gnupg, you must also additionally apply execute permissions to that folder. Folders require execution privileges to be opened. For more information on permissions, you can check out <a href="https://helpdeskgeek.com/linux-tips/understanding-linux-permissions-chmod-usage/">this detailed information guide</a>.</p>
a6ffc443 453</dd>
84f4c9ad 454
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455<dt class="feedback">Don't see a solution to your problem?</dt>
456<dd class="feedback">Please let us know on the <a
457href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
458page</a>.</dd>
459</dl>
460
461</div><!-- /.troubleshooting -->
462
463<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
464<div class="troubleshooting">
465
466<h4>Advanced</h4>
467
468<dl>
469<dt>More about keyservers</dt>
470<dd>You can find some more keyserver information<a
7fb01a19
M
471href="https://www.gnupg.org/gph/en/manual/x457.html"> in this manual</a>. <a
472href="https://keys.mailvelope.com">The Mailvelope Key Server</a>
473allows automatic public key lookup. You can also <a
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474href="https://www.gnupg.org/gph/en/manual/x56.html#AEN64">directly export
475your key</a> as a file on your computer.</dd>
476
477<dt>Transferring your keys</dt>
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478<dd>
479<p>Use the following commands to transfer your keys. To avoid getting your key compromised, store it in a safe place, and make sure that if it is transferred, it is done so in a trusted way. Importing and exporting a key can be done with the following commands:</p>
a6ffc443 480
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481<p><code>
482$ gpg --export-secret-keys -a [keyID] > my_private_key.asc<br />
483$ gpg --export -a [keyID] > my_public_key.asc<br />
484$ gpg --import my_private_key.asc<br />
485$ gpg --import my_public_key.asc
486</code></p>
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487
488<p>Ensure that the keyID printed is the correct one, and if so, then go ahead and add ultimate trust for it:</p>
dfee0188 489
df371bd3 490<p><code>
a6ffc443 491$ gpg --edit-key [your@email]
df371bd3 492</code></p>
a6ffc443 493
99d3c5e1 494<p>Because this is your key, you should choose <code>ultimate</code>&#65279;. You shouldn't trust anyone else's key ultimately.</p>
a6ffc443 495
b9a7f2fa 496<p class="notes"> Refer to <a href="#step-2b">Troubleshooting in Step 2.B</a> for more information on permissions. When transferring keys, your permissions may get mixed, and errors may be prompted. These are easily avoided when your folders and files have the right permissions</p>
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497</dd>
498</dl>
499
500</div><!-- /.troubleshooting -->
501</div><!-- End .main -->
502</div><!-- End #step-2b .step -->
503</div></section><!-- End #section2 -->
504
505<!-- ~~~~~~~~~ Section 3: Set up email encryption ~~~~~~~~~ -->
506<section id="section3" class="row"><div>
507
508<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
509<div class="section-intro">
510
511<h2><em>#3</em> Set up email encryption</h2>
5e3f938b 512<p class="notes">The Icedove (or Thunderbird) email program has PGP functionality integrated, which makes it pretty easy to work with. We'll take you through the steps of integrating and using your key in these email clients.</p>
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513
514</div><!-- End .section-intro -->
515
516<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
517<div id="step-3a" class="step">
518<div class="sidebar">
519
7b371af8 520<p class="large"><img src="../static/img/en/screenshots/step3a-open-key-manager.png"
a6ffc443 521alt="Step 3.A: Email Menu" /></p>
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522
523<p class="large"><img src="../static/img/en/screenshots/step3a-import-from-file.png"
a6ffc443 524alt="Step 3.A: Import From File" /></p>
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525
526<p class="large"><img src="../static/img/en/screenshots/step3a-success.png"
a6ffc443 527alt="Step 3.A: Success" /></p>
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528
529<p class="large"><img src="../static/img/en/screenshots/step3a-troubleshoot.png"
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530alt="Step 3.A: Troubleshoot" /></p>
531</div><!-- /.sidebar -->
532<div class="main">
533
534<h3><em>Step 3.a</em> Set up your email with encryption</h3>
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535
536<p>Once you have set up your email with encryption, you can start contributing to encrypted traffic on the Internet. First we'll get your email client to import your secret key, and we will also learn how to get other people's public keys from servers so you can send and receive encrypted email.</p>
a6ffc443 537
685d29d0 538<p># Open your email client and use "Tools" &rarr; <i>OpenPGP Key Manager</i></p>
df371bd3 539<p># Under "File" &rarr; <i>Import Secret Key(s) From File</i></p>
b9a7f2fa 540<p># Select the file you saved under the name [my_secret_key.asc] in <a href="#step-2b">Step 2.B</a> when you exported your key</p>
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541<p># Unlock with your passphrase</p>
542<p># You will receive a "OpenPGP keys successfully imported" window to confirm success</p>
685d29d0 543<p># Go to "Account settings" &rarr; "End-To-End Encryption," and make sure your key is imported and select <i>Treat this key as a Personal Key</i>.</p>
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544
545</div><!-- End .main -->
546
547<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
548<div class="main">
549<div class="troubleshooting">
550<h4>Troubleshooting</h4>
551<dl>
552<dt>I'm not sure the import worked correctly</dt>
553<dd>
a6c4ddc6 554Look for "Account settings" &rarr; "End-To-End Encryption." Here you can see if your personal key associated with this email is found. If it is not, you can try again via the <i>Add key</i> option. Make sure you have the correct, active, secret key file.
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555</dd>
556
557<dt class="feedback">Don't see a solution to your problem?</dt>
558<dd class="feedback">Please let us know on the <a
559href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
560page</a>.</dd>
561</dl>
562
563</div><!-- /.troubleshooting -->
564</div><!-- End .main -->
565</div><!-- End #step3-a .step -->
566</div></section><!-- End #section3 -->
567
568<!-- ~~~~~~~~~ Section 4: Try it out ~~~~~~~~~ -->
569<section class="row" id="section4"><div>
570
571<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
572<div class="section-intro">
573
574<h2><em>#4</em> Try it out!</h2>
7b371af8 575<p class="float small"><img src="../static/img/en/screenshots/section3-try-it-out.png" alt="Illustration of a person in a house with a cat connected to a server"/></p>
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576<p>Now you'll try a test correspondence with an FSF computer program named Edward,
577who knows how to use encryption. Except where noted, these are the same
578steps you'd follow when corresponding with a real, live person.</p>
579
580<!-- <p>NOTE: Edward is currently having some technical difficulties, so he
581may take a long time to respond, or not respond at all. We're sorry about
582this and we're working hard to fix it. Your key will still work even without
583testing with Edward.</p> -->
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584
585<div style="clear: both"></div>
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586</div><!-- End .section-intro -->
587
588<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
589<div id="step-4a" class="step">
590<div class="sidebar">
591
7b371af8 592<p class="large"><img
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593src="../static/img/en/screenshots/step4a-send-key-to-Edward.png"
594alt="Step 4.A Send key to Edward." /></p>
595
596</div><!-- /.sidebar -->
597<div class="main">
598
599<h3><em>Step 4.a</em> Send Edward your public key</h3>
600
601<p>This is a special step that you won't have to do when corresponding
602with real people. In your email program's menu, go to "Tools" &rarr; "OpenPGP Key
603Manager." You should see your key in the list that pops up. Right click
df371bd3 604on your key and select <i>Send Public Keys by Email</i>. This will create a new draft message, as if you had just hit the "Write" button, but in the attachment you will find your public keyfile.</p>
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605
606<p>Address the message to <a
607href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Put at least one word
608(whatever you want) in the subject and body of the email. Don't send yet.</p>
609
df371bd3 610<p>We want Edward to be able to open the email with your keyfile, so we want this first special message to be unencrypted. Make sure encryption is turned off by using the dropdown menu "Security" and select <i>Do Not Encrypt</i>. Once encryption is off, hit Send.</p>
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611
612<p class="notes">It may take two or three minutes for Edward to
613respond. In the meantime, you might want to skip ahead and check out the <a
614href="#section6">Use it Well</a> section of this guide. Once you have received a response,
615head to the next step. From here on, you'll be doing just the same thing as
616when corresponding with a real person.</p>
617
618<p>When you open Edward's reply, GnuPG may prompt you for your passphrase
619before using your private key to decrypt it.</p>
620
621</div><!-- End .main -->
622</div><!-- End #step-4a .step -->
623
624<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
625<div id="step-4b" class="step">
626<div class="sidebar">
627
7b371af8 628<p class="large"><img
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629src="../static/img/en/screenshots/step4b-option1-verify-key.png"
630alt="Step 4.B Option 1. Verify key" /></p>
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631
632<p class="large"><img
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633src="../static/img/en/screenshots/step4b-option2-import-key.png"
634alt="Step 4.B Option 2. Import key" /></p>
635</div><!-- /.sidebar -->
636
637<div class="main">
638
639<h3><em>Step 4.b</em> Send a test encrypted email</h3>
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640
641<h4>Get Edward's key</h4>
642
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643<p>To encrypt an email to Edward, you need its public key, so now you'll have
644to download it from a keyserver. You can do this in two different ways:</p>
a6c4ddc6 645<p><strong>Option 1.</strong> In the email answer you received from Edward as a response to your first email, Edward's public key was included. On the right of the email, just above the writing area, you will find an "OpenPGP" button that has a lock and a little wheel next to it. Click that, and select <i>Discover</i> next to the text: "This message was signed with a key that you don't yet have." A popup with Edward's key details will follow.</p>
a6ffc443 646
685d29d0 647<p><strong>Option 2.</strong> Open your OpenPGP Key manager, and under "Keyserver" choose <i>Discover Keys Online</i>. Here, fill in Edward's email address, and import Edward's key.</p>
a6ffc443 648
df371bd3 649<p>The option <i>Accepted (unverified)</i> will add this key to your key manager, and now it can be used to send encrypted emails and to verify digital signatures from Edward.</p>
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650
651<p class="notes">In the popup window confirming if you want to import Edward's key, you'll see many different emails that are all associated with its key. This is correct; you can safely import the key.</p>
652
653<p class="notes">Since you encrypted this email with Edward's public key,
654Edward's private key is required to decrypt it. Edward is the only one with
655its private key, so no one except Edward can decrypt it.</p>
656
df371bd3 657<h4>Send Edward an encrypted email</h4>
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658
659<p> Write a new email in your email program, addressed to <a
660href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Make the subject
661"Encryption test" or something similar and write something in the body.</p>
662
df371bd3 663<p>This time, make sure encryption is turned on by using the dropdown menu "Security" and select <i>Require Encryption</i>. Once encryption is on, hit Send.</p>
a6ffc443 664
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665
666<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
667<div class="troubleshooting">
668
669<h4>Troubleshooting</h4>
670
671<dl>
672<dt>"Recipients not valid, not trusted or not found"</dt>
05d7f3ed 673<dd>You could get the above error message, or something along these lines: "Unable to send this message with end-to-end encryption, because there are problems with the keys of the following recipients: ..." In these cases, you may be trying to send an encrypted email to someone when you do not have their public key yet. Make sure you follow the steps above to import the key to your key manager. Open the OpenPGP Key Manager to make sure the recipient is listed there.</dd>
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674
675<dt>Unable to send message</dt>
df371bd3 676<dd>You could get the following message when trying to send your encrypted email: "Unable to send this message with end-to-end encryption, because there are problems with the keys of the following recipients: edward-en@fsf.org." This usually means you imported the key with the "unaccepted (unverified) option." Go to the "key properties" of this key by right clicking on the key in the OpenPGP Key Manager, and select the option <i>Yes, but I have not verified that this is the correct key</i> in the "Acceptance" option at the bottom of this window. Resend the email.</dd>
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677
678<dt>I can't find Edward's key</dt>
679<dd>Close the pop-ups that have appeared since you clicked Send. Make sure
05d7f3ed 680you are connected to the Internet and try again. If that doesn't work, you can download the key manually from <a href="https://keys.openpgp.org/search?q=edward-en%40fsf.org">the keyserver</a>, and import it by using the <i>Import Public Key(s) from File</i> option in the OpenPGP Key Manager.</dd>
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681
682<dt>Unscrambled messages in the Sent folder</dt>
683<dd>Even though you can't decrypt messages encrypted to someone else's key,
684your email program will automatically save a copy encrypted to your public key,
685which you'll be able to view from the Sent folder like a normal email. This
686is normal, and it doesn't mean that your email was not sent encrypted.</dd>
687
688<dt class="feedback">Don't see a solution to your problem?</dt>
689<dd class="feedback">Please let us know on the <a
690href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
691page</a>.</dd>
692</dl>
693
694</div><!-- /.troubleshooting -->
695
696<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
697<div class="troubleshooting">
698
699<h4>Advanced</h4>
700
701<dl>
702<dt>Encrypt messages from the command line</dt>
703<dd>You can also encrypt and decrypt messages and files from the <a
704href="https://www.gnupg.org/gph/en/manual/x110.html">command line</a>,
705if that's your preference. The option --armor makes the encrypted output
706appear in the regular character set.</dd>
707</dl>
708
709</div><!-- /.troubleshooting -->
710</div><!-- End .main -->
711</div><!-- End #step-4b .step -->
712
713<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
714<div id="step-headers_unencrypted" class="step">
715<div class="main">
716
717<h3><em>Important:</em> Security tips</h3>
718
719<p>Even if you encrypt your email, the subject line is not encrypted, so
720don't put private information there. The sending and receiving addresses
721aren't encrypted either, so a surveillance system can still figure out who
722you're communicating with. Also, surveillance agents will know that you're
723using GnuPG, even if they can't figure out what you're saying. When you
724send attachments, you can choose to encrypt them or not,
725independent of the actual email.</p>
726
727<p>For greater security against potential attacks, you can turn off
728HTML. Instead, you can render the message body as plain text. In order
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729to do this in Icedove or Thunderbird, go to "View" &rarr; "Message Body As" &rarr; <i>Plain
730Text</i>.</p>
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731
732</div><!-- End .main -->
733</div><!-- End #step-headers_unencrypted .step-->
734
735<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
736<div id="step-4c" class="step">
737<div class="sidebar">
738
7b371af8 739<p class="large"><img
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740src="../static/img/en/screenshots/step4c-Edward-response.png"
741alt="Step 4.C Edward's response" /></p>
742
743</div><!-- /.sidebar -->
744
745<div class="main">
746
747<h3><em>Step 4.c</em> Receive a response</h3>
748
749<p>When Edward receives your email, it will use its private key to decrypt
750it, then reply to you. </p>
751
752<p class="notes">It may take two or three minutes for Edward to
753respond. In the meantime, you might want to skip ahead and check out the <a
754href="#section6">Use it Well</a> section of this guide.</p>
755
8df3fe60 756<p>Edward will send you an encrypted email back saying your email was received and decrypted. Your email client will automatically decrypt Edward's message.</p>
a6ffc443 757
2a2a4521 758<p class="notes">The OpenPGP button in the email will show a little green checkmark over the lock symbol to show the message is encrypted, and a little orange warning sign which means that you have accepted the key, but not verified it. When you have not yet accepted the key, you will see a little question mark there. Clicking the prompts in this button will lead you to key properties as well.</p>
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759
760</div><!-- End .main -->
761</div><!-- End #step-4c .step -->
762
763<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
764<div id="step-4d" class="step">
765<div class="main">
766
767<h3><em>Step 4.d</em> Send a signed test email</h3>
768
769<p>GnuPG includes a way for you to sign messages and files, verifying that
770they came from you and that they weren't tampered with along the way. These
771signatures are stronger than their pen-and-paper cousins -- they're impossible
772to forge, because they're impossible to create without your private key
773(another reason to keep your private key safe).</p>
774
775<p>You can sign messages to anyone, so it's a great way to make people
776aware that you use GnuPG and that they can communicate with you securely. If
777they don't have GnuPG, they will be able to read your message and see your
778signature. If they do have GnuPG, they'll also be able to verify that your
779signature is authentic.</p>
780
781<p>To sign an email to Edward, compose any message to the email address and click the
782pencil icon next to the lock icon so that it turns gold. If you sign a
8ea69a99 783message, GnuPG may ask you for your passphrase before it sends the message,
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784because it needs to unlock your private key for signing.</p>
785
df371bd3 786<p>In "Account Settings" &rarr; "End-To-End-Encryption" you can opt to <i>add digital signature by default</i>.</p>
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787
788</div><!-- End .main -->
789</div><!-- End #step-4d .step -->
790
791<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
792<div id="step-4e" class="step">
793<div class="main">
794
795<h3><em>Step 4.e</em> Receive a response</h3>
796
797<p>When Edward receives your email, he will use your public key (which
798you sent him in <a href="#step-3a">Step 3.A</a>) to verify the message
799you sent has not been tampered with and to encrypt a reply to you.</p>
800
801<p class="notes">It may take two or three minutes for Edward to
802respond. In the meantime, you might want to skip ahead and check out the <a
803href="#section6">Use it Well</a> section of this guide.</p>
804
805<p>Edward's reply will arrive encrypted, because he prefers to use encryption
806whenever possible. If everything goes according to plan, it should say
807"Your signature was verified." If your test signed email was also encrypted,
808he will mention that first.</p>
809
810<p>When you receive Edward's email and open it, your email client will
811automatically detect that it is encrypted with your public key, and
812then it will use your private key to decrypt it.</p>
813
814</div><!-- End .main -->
815</div><!-- End #step-4e .step -->
816</div></section>
817
818<!-- ~~~~~~~~~ Section 5: Learn About the Web of Trust ~~~~~~~~~ -->
819<section class="row" id="section5"><div>
820
821<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
822<div class="section-intro">
823
824<h2><em>#5</em> Learn about the Web of Trust</h2>
7b371af8 825<p class="float small"><img src="../static/img/en/screenshots/section5-web-of-trust.png" alt="Illustration of keys all interconnected with a web of lines"/></p>
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826
827<p>Email encryption is a powerful technology, but it has a weakness:
828it requires a way to verify that a person's public key is actually
829theirs. Otherwise, there would be no way to stop an attacker from making
830an email address with your friend's name, creating keys to go with it, and
831impersonating your friend. That's why the free software programmers that
832developed email encryption created keysigning and the Web of Trust.</p>
833
834<p>When you sign someone's key, you are publicly saying that you've verified
835that it belongs to them and not someone else.</p>
836
837<p>Signing keys and signing messages use the same type of mathematical
838operation, but they carry very different implications. It's a good practice
839to generally sign your email, but if you casually sign people's keys, you
b8ee01bf 840may accidentally end up vouching for the identity of an imposter.</p>
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841
842<p>People who use your public key can see who has signed it. Once you've
843used GnuPG for a long time, your key may have hundreds of signatures. You
844can consider a key to be more trustworthy if it has many signatures from
845people that you trust. The Web of Trust is a constellation of GnuPG users,
846connected to each other by chains of trust expressed through signatures.</p>
847
848</div><!-- End .section-intro -->
849
850<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
851<div id="step-5a" class="step">
852<div class="sidebar">
853
7b371af8 854<p class="large"><img
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855src="../static/img/en/screenshots/step5a-key-properties.png"
856alt="Section 5: trusting a key" /></p>
857
858</div><!-- /.sidebar -->
859<div class="main">
860
861<h3><em>Step 5.a</em> Sign a key</h3>
862
df371bd3 863<p>In your email program's menu, go to OpenPGP Key Manager and select <i>Key properties</i> by right clicking on Edward's key.</p>
a6ffc443 864
df371bd3 865<p>Under "Your Acceptance," you can select <i>Yes, I've verified in person this key has the correct fingerprint"</i>.</p>
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866
867<p class="notes">You've just effectively said "I trust that Edward's public
868key actually belongs to Edward." This doesn't mean much because Edward isn't
869a real person, but it's good practice, and for real people it is important. You can read more about signing a person's key in the <a href="#check-ids-before-signing">check IDs before signing</a> section.</p>
870
871<!--<div id="pgp-pathfinder">
872
873<form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi"
874method="get">
875
876<p><strong>From:</strong><input type="text" value="xD41A008"
877name="FROM"></p>
878
879<p><strong>To:</strong><input type="text" value="50BD01x4" name="TO"></p>
880
881<p class="buttons"><input type="submit" value="trust paths" name="PATHS"><input
882type="reset" value="reset" name=".reset"></p>
883
884</form>
885
886</div>End #pgp-pathfinder -->
887</div><!-- End .main -->
888</div><!-- End #step-5a .step -->
889
890<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
891<div id="step-identify_keys" class="step">
892<div class="main">
893
894<h3>Identifying keys: Fingerprints and IDs</h3>
895
896<p>People's public keys are usually identified by their key fingerprint,
897which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8
898(for Edward's key). You can see the fingerprint for your public key, and
899other public keys saved on your computer, by going to OpenPGP Key
900Management in your email program's menu, then right clicking on the key
901and choosing Key Properties. It's good practice to share your fingerprint
902wherever you share your email address, so that people can double-check that
903they have the correct public key when they download yours from a keyserver.</p>
904
905<p class="notes">You may also see public keys referred to by a shorter
906keyID. This keyID is visible directly from the Key Management
907window. These eight character keyIDs were previously used for
908identification, which used to be safe, but is no longer reliable. You
909need to check the full fingerprint as part of verifying you have the
910correct key for the person you are trying to contact. Spoofing, in
911which someone intentionally generates a key with a fingerprint whose
912final eight characters are the same as another, is unfortunately
913common.</p>
914
915</div><!-- End .main -->
916</div><!-- End #step-identify_keys .step-->
917
918<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
919<div id="check-ids-before-signing" class="step">
920<div class="main">
921
922<h3><em>Important:</em> What to consider when signing keys</h3>
923
924<p>Before signing a person's key, you need to be confident that it actually
925belongs to them, and that they are who they say they are. Ideally, this
926confidence comes from having interactions and conversations with them over
927time, and witnessing interactions between them and others. Whenever signing
928a key, ask to see the full public key fingerprint, and not just the shorter
929keyID. If you feel it's important to sign the key of someone you've just
930met, also ask them to show you their government identification, and make
931sure the name on the ID matches the name on the public key.</p>
932
933<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
934<div class="troubleshooting">
935
936<h4>Advanced</h4>
937
938<dl>
939<dt>Master the Web of Trust</dt>
940<dd>Unfortunately, trust does not spread between users the way <a
941href="https://fennetic.net/irc/finney.org/~hal/web_of_trust.html">many people
942think</a>. One of the best ways to strengthen the GnuPG community is to deeply <a
943href="https://www.gnupg.org/gph/en/manual/x334.html">understand</a> the Web of
944Trust and to carefully sign as many people's keys as circumstances permit.</dd>
945</dl>
946
947</div><!-- /.troubleshooting -->
948</div><!-- End .main -->
949</div><!-- End #check-ids-before-signing .step-->
950</div></section><!-- End #section5 -->
951
952<!-- ~~~~~~~~~ Section 6: Use it well ~~~~~~~~~ -->
953<section id="section6" class="row"><div>
954
955<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
956<div class="section-intro">
957
958<h2><em>#6</em> Use it well</h2>
959
960<p>Everyone uses GnuPG a little differently, but it's important to follow
961some basic practices to keep your email secure. Not following them, you
962risk the privacy of the people you communicate with, as well as your own,
963and damage the Web of Trust.</p>
964
965</div><!-- End .section-intro -->
966
967<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
968<div id="step-6a" class="step">
969<div class="sidebar">
970
7b371af8 971<p class="medium"><img
a6ffc443
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972src="../static/img/en/screenshots/section6-01-use-it-well.png"
973alt="Section 6: Use it Well (1)" /></p>
974
975</div><!-- /.sidebar -->
976<div class="main">
977
978<h3>When should I encrypt? When should I sign?</h3>
979
980<p>The more you can encrypt your messages, the better. If you only encrypt
981emails occasionally, each encrypted message could raise a red flag for
982surveillance systems. If all or most of your email is encrypted, people
983doing surveillance won't know where to start. That's not to say that only
984encrypting some of your email isn't helpful -- it's a great start and it
985makes bulk surveillance more difficult.</p>
986
987<p>Unless you don't want to reveal your own identity (which requires other
988protective measures), there's no reason not to sign every message, whether or
989not you are encrypting. In addition to allowing those with GnuPG to verify
990that the message came from you, signing is a non-intrusive way to remind
991everyone that you use GnuPG and show support for secure communication. If you
992often send signed messages to people that aren't familiar with GnuPG, it's
993nice to also include a link to this guide in your standard email signature
994(the text kind, not the cryptographic kind).</p>
995
996</div><!-- End .main -->
997</div><!-- End #step-6a .step -->
998
999<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1000<div id="step-6b" class="step">
1001<div class="sidebar">
1002
7b371af8 1003<p class="medium"><img
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1004src="../static/img/en/screenshots/section6-02-use-it-well.png"
1005alt="Section 6: Use it Well (2)" /></p>
1006
1007</div><!-- /.sidebar -->
1008<div class="main">
1009
1010<h3>Be wary of invalid keys</h3>
1011
1012<p>GnuPG makes email safer, but it's still important to watch out for invalid
1013keys, which might have fallen into the wrong hands. Email encrypted with
1014invalid keys might be readable by surveillance programs.</p>
1015
1016<p>In your email program, go back to the first encrypted email that Edward
1017sent you. Because Edward encrypted it with your public key, it will have a
1018green checkmark a at the top "OpenPGP" button.</p>
1019
df371bd3 1020<p><strong>When using GnuPG, make a habit of glancing at that button. The program
a6ffc443 1021will warn you there if you get an email signed with a key that can't
df371bd3 1022be trusted.</strong></p>
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1023
1024</div><!-- End .main -->
1025</div><!-- End #step-6b .step -->
1026
1027<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1028<div id="step-6c" class="step">
1029<div class="main">
1030
1031<h3>Copy your revocation certificate to somewhere safe</h3>
1032
1033<p>Remember when you created your keys and saved the revocation certificate
1034that GnuPG made? It's time to copy that certificate onto the safest storage that you have -- a flash drive, disk, or hard drive stored in a safe place in your home could work, not on a device you carry with you regularly. The safest way we know is actually to print the revocation certificate and store it in a safe place.</p>
1035
1036<p>If your private key ever gets lost or stolen, you'll need this certificate
1037file to let people know that you are no longer using that keypair.</p>
1038
1039</div><!-- End .main -->
1040</div><!-- End #step-6c .step -->
1041
1042<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1043<div id="step-lost_key" class="step">
1044<div class="main">
1045
1046<h3><em>IMPORTANT:</em> ACT SWIFTLY if someone gets your private key</h3>
1047
1048<p>If you lose your private key or someone else gets a hold
1049of it (say, by stealing or cracking your computer), it's
1050important to revoke it immediately before someone else uses
1051it to read your encrypted email or forge your signature. This
1052guide doesn't cover how to revoke a key, but you can follow these <a
1053href="https://www.hackdiary.com/2004/01/18/revoking-a-gpg-key/">instructions</a>.
1054After you're done revoking, make a new key and send an email to everyone
1055with whom you usually use your key to make sure they know, including a copy
1056of your new key.</p>
1057
1058</div><!-- End .main -->
1059</div><!-- End #step-lost_key .step-->
1060
1061<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1062<div id="webmail-and-GnuPG" class="step">
1063<div class="main">
1064
1065<h3>Webmail and GnuPG</h3>
1066
1067<p>When you use a web browser to access your email, you're using webmail,
1068an email program stored on a distant website. Unlike webmail, your desktop
1069email program runs on your own computer. Although webmail can't decrypt
1070encrypted email, it will still display it in its encrypted form. If you
1071primarily use webmail, you'll know to open your email client when you receive
1072a scrambled email.</p>
1073
1074</div><!-- End .main -->
1075</div><!-- End #webmail-and-GnuPG .step-->
1076
1077<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1078<div id="step-6d" class="step">
1079<div class="main">
1080
1081<h3>Make your public key part of your online identity</h3>
1082
1083<p> First add your public key fingerprint to your email signature, then
1084compose an email to at least five of your friends, telling them you just
1085set up GnuPG and mentioning your public key fingerprint. Link to this guide
1086and ask them to join you. Don't forget that there's also an awesome <a
1087href="infographic.html">infographic to share.</a></p>
1088
1089<p class="notes">Start writing your public key fingerprint anywhere someone
1090would see your email address: your social media profiles, blog, Website,
1091or business card. (At the Free Software Foundation, we put ours on our
1092<a href="https://fsf.org/about/staff">staff page</a>.) We need to get our
1093culture to the point that we feel like something is missing when we see an
1094email address without a public key fingerprint.</p>
1095
1096</div><!-- End .main-->
1097</div><!-- End #step-6d .step-->
1098</div></section><!-- End #section6 -->
1099
1100<!-- ~~~~~~~~~ Section 7: Next steps ~~~~~~~~~ -->
1101<section class="row" id="section7">
1102<div id="step-click_here" class="step">
1103<div class="main">
1104
1105<h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
1106
1107</div><!-- End .main -->
1108</div><!-- End #step-click_here .step-->
1109</section><!-- End #section7 -->
1110
1111<!-- ~~~~~~~~~ FAQ ~~~~~~~~~ -->
1112<!-- When un-commenting this section go to main.css and search
1113for /* Guide Sections Background */ then add #faq to the desired color
1114<section class="row" id="faq"><div>
1115<div class="sidebar">
1116
1117<h2>FAQ</h2>
1118
1119</div>
1120<div class="main">
1121
1122<dl>
1123<dt>My key expired</dt>
1124<dd>Answer coming soon.</dd>
1125
1126<dt>Who can read encrypted messages? Who can read signed ones?</dt>
1127<dd>Answer coming soon.</dd>
1128
1129<dt>My email program is opening at times I don't want it to open/is now my
1130default program and I don't want it to be.</dt>
1131<dd>Answer coming soon.</dd>
1132</dl>
1133
1134</div>
1135</div>
1136</section> --><!-- End #faq -->
1137
1138<!-- ~~~~~~~~~ Footer ~~~~~~~~~ -->
1139<footer class="row" id="footer"><div>
1140<div id="copyright">
1141
1142<h4><a href="https://u.fsf.org/ys"><img
1143alt="Free Software Foundation"
1144src="../static/img/fsf-logo.png" /></a></h4>
1145
1146<p>Copyright &copy; 2014-2021 <a
1147href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a
1148href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. Please
1149support our work by <a href="https://u.fsf.org/yr">joining us as an associate
1150member.</a></p>
1151
1152<p>The images on this page are under a <a
1153href="https://creativecommons.org/licenses/by/4.0/">Creative Commons
1154Attribution 4.0 license (or later version)</a>, and the rest of it is under
1155a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons
1156Attribution-ShareAlike 4.0 license (or later version)</a>. Download the <a
1157href="https://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">
1158source code of Edward reply bot</a> by Andrew Engelbrecht
1159&lt;andrew@engelbrecht.io&gt; and Josh Drake &lt;zamnedix@gnu.org&gt;,
1160available under the GNU Affero General Public License. <a
1161href="https://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these
1162licenses?</a></p>
1163
1164<p>Fonts used in the guide &amp; infographic: <a
1165href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo
1166Impallari, <a href="https://www.google.com/fonts/specimen/Signika">Signika</a>
1167by Anna Giedry&#347;, <a
1168href="https://www.google.com/fonts/specimen/Archivo+Narrow">Archivo
1169Narrow</a> by Omnibus-Type, <a
1170href="https://libreplanet.org/wiki/GPG_guide/Graphics_Howto#Pitfalls">PXL-2000</a>
1171by Florian Cramer.</p>
1172
1173<p>Download the <a href="emailselfdefense_source.zip">source package</a>
1174for this guide, including fonts, image source files and the text of Edward's
1175messages.</p>
1176
1177<p>This site uses the Weblabels standard for labeling <a
1178href="https://www.fsf.org/campaigns/freejs">free JavaScript</a>. View
1179the JavaScript <a href="https://weblabels.fsf.org/emailselfdefense.fsf.org/"
1180rel="jslicense">source code and license information</a>.</p>
1181
1182</div><!-- /#copyright -->
1183
1184<p class="credits">Infographic and guide design by <a rel="external"
1185href="https://jplusplus.org"><strong>Journalism++</strong><img
317245bd 1186src="../static/img/jplusplus.png"
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1187alt="Journalism++" /></a></p><!-- /.credits -->
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