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to Enigmail's PGP functionality being migrated into Icedove and Thunderbird, steps 2 and 3 of the guide are currently out of date.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