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116f80c3 3<head>
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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,
77aea16c 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" />
14c5f099 13<link rel="stylesheet" href="../static/css/main.css" />
19bce4d7 14<link rel="shortcut icon"
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a6beda57 17<body>
db4fb2f0 18
e59c77da 19<!--<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to Enigmail's PGP functionality being migrated into Icedove and Thunderbird, steps 2 and 3 of the guide are currently out of date.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>-->
0e203e6f 20
f12cd56f 21<!-- PLACE FUNDRAISER MODAL WINDOW HERE -->
6b3fb780 22
701d3bdd 23
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24<!-- ~~~~~~~~~ GnuPG Header and introduction text ~~~~~~~~~ -->
25<header class="row" id="header"><div>
116f80c3 26
e59c77da 27
19bce4d7 28<h1>Email Self-Defense</h1>
116f80c3 29
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30<!-- Language list for browsers that do not have JS enabled -->
31<ul id="languages" class="os">
de17dfbe 32<li><a class="current" href="/en">English - v5.0</a></li>
7c252a78 33<li><a href="/es">español - v5.0</a></li>
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34<li><a href="/fr">français - v5.0</a></li>
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42<li><a href="/pl">polski - v5.0</a></li>
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46<li><a href="/sq">Shqip - v5.0</a></li>
47<!--<li><a href="/sv">svenska - v4.0</a></li>-->
9edd68b4 48<li><a href="/zh-hans">简体中文 - v5.0</a></li>
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49<li><strong><a href="https://libreplanet.org/wiki/GPG_guide/Translation_Guide">
50Translate!</a></strong></li>
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51</ul>
52
53<ul id="menu" class="os">
37d0bc33 54<li class="spacer"><a href="index.html" class="current">Set up guide</a></li>
55<!--<li><a href="mac.html">Mac OS</a></li>-->
56<!--<li><a href="windows.html">Windows</a></li>-->
f211d856 57<li class="spacer"><a href="workshops.html">Teach your friends</a></li>
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58<li class="spacer"><a
59href="http://hhldo3tnt5solzj2bwfvh7xm4slk2forpjwjyemhcfrlob5gq75gioid.onion/en"
60target="_blank">This site's tor onion service</a></li>
f211d856 61<li class="spacer"><a
770452f9 62href="https://fsf.org/share?u=https://u.fsf.org/zb&amp;t=Email%20encryption%20for%20everyone%20via%20%40fsf">
f211d856 63Share&nbsp;
14c5f099 64<img src="../static/img/gnu-social.png" class="share-logo"
19bce4d7 65alt="[GNU Social]" />&nbsp;
14c5f099 66<img src="../static/img/mastodon.png" class="share-logo"
d06ce723 67alt="[Mastodon]" />&nbsp;
14c5f099 68<img src="../static/img/reddit-alien.png" class="share-logo"
19bce4d7 69alt="[Reddit]" />&nbsp;
14c5f099 70<img src="../static/img/hacker-news.png" class="share-logo"
f211d856 71alt="[Hacker News]" /></a></li>
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72</ul>
73
74<!-- ~~~~~~~~~ FSF Introduction ~~~~~~~~~ -->
75<div id="fsf-intro">
76
6003a573 77<h3><a href="https://u.fsf.org/ys"><img
19bce4d7 78alt="Free Software Foundation"
14c5f099 79src="../static/img/fsf-logo.png" />
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80</a></h3>
81
82<div class="fsf-emphasis">
83
84<p>We fight for computer users' rights, and promote the development of free (as
85in freedom) software. Resisting bulk surveillance is very important to us.</p>
86
87<p><strong>Please donate to support Email Self-Defense. We need to keep
88improving it, and making more materials, for the benefit of people around
89the world taking the first step towards protecting their privacy.</strong></p>
90
91</div>
92
d1f39676 93<div style="text-align: center;">
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94<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>
95
d1f39676 96<h5>Sign up</h5>
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97<form action="https://my.fsf.org/civicrm/profile/create?reset=1&amp;gid=31" method="post">
98<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>
d1f39676 99
100<p><input id="frmEmail" type="text" name="email-Primary" size="18" maxlength="80" /></p>
101<p><input type="submit" name="_qf_Edit_next" value="Subscribe me" /></p>
102<div><input name="postURL" type="hidden" value="" />
103<input type="hidden" name="group[25]" value="1" />
9162eaf3 104<input name="cancelURL" type="hidden" value="https://my.fsf.org/civicrm/profile?reset=1&amp;gid=31" />
d1f39676 105<input name="_qf_default" type="hidden" value="Edit:cancel" />
106</div>
107</form></div>
64a48f78 108
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109</div><!-- End #fsf-intro -->
110
111<!-- ~~~~~~~~~ Guide Introduction ~~~~~~~~~ -->
112<div class="intro">
113
114<p><a id="infographic" href="infographic.html"><img
14c5f099 115src="../static/img/en/infographic-button.png"
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116alt="View &amp; share our infographic &rarr;" /></a>
117Bulk surveillance violates our fundamental rights and makes free speech
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118risky. This guide will teach you a basic surveillance self-defense skill: email
119encryption. Once you've finished, you'll be able to send and receive emails
120that are scrambled to make sure a surveillance agent or thief intercepting
121your email can't read them. All you need is a computer with an Internet
122connection, an email account, and about forty minutes.</p>
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123
124<p>Even if you have nothing to hide, using encryption helps protect the privacy
125of people you communicate with, and makes life difficult for bulk surveillance
126systems. If you do have something important to hide, you're in good company;
127these are the same tools that whistleblowers use to protect their identities
80b64e11 128while shining light on human rights abuses, corruption, and other crimes.</p>
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129
130<p>In addition to using encryption, standing up
131to surveillance requires fighting politically for a <a
e59c77da 132href="https://gnu.org/philosophy/surveillance-vs-democracy.html">reduction
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133in the amount of data collected on us</a>, but the essential first step is
134to protect yourself and make surveillance of your communication as difficult
135as possible. This guide helps you do that. It is designed for beginners, but
136if you already know the basics of GnuPG or are an experienced free software
137user, you'll enjoy the advanced tips and the <a href="workshops.html">guide
138to teaching your friends</a>.</p>
139
140</div><!-- End .intro -->
141</div></header><!-- End #header -->
142
143<!-- ~~~~~~~~~ Section 1: Get the pieces ~~~~~~~~~ -->
144<section class="row" id="section1"><div>
145
146<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
147<div class="section-intro">
148
149<h2><em>#1</em> Get the pieces</h2>
150
151<p class="notes">This guide relies on software which is <a
152href="https://www.gnu.org/philosophy/free-sw.html">freely licensed</a>;
153it's completely transparent and anyone can copy it or make their
154own version. This makes it safer from surveillance than proprietary
80b64e11 155software (like Windows or macOS). Learn more about free software at <a
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156href="https://u.fsf.org/ys">fsf.org</a>.</p>
157
c174e65c 158<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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160</div><!-- End .section-intro -->
161
162<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
163<div id="step-1a" class="step">
164<div class="sidebar">
165
69e314de 166<p class="large"><img
14c5f099 167src="../static/img/en/screenshots/step1a-install-wizard.png"
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168alt="Step 1.A: Install Wizard" /></p>
169
170</div><!-- /.sidebar -->
171<div class="main">
172
173<h3><em>Step 1.a</em> Set up your email program with your email account</h3>
174
175<p>Open your email program and follow the wizard (step-by-step walkthrough)
37d0bc33 176that 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>
77aea16c 177
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178
179<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
180<div class="troubleshooting">
181
182<h4>Troubleshooting</h4>
183
184<dl>
185<dt>The wizard doesn't launch</dt>
186<dd>You can launch the wizard yourself, but the menu option for doing so is
187named differently in each email program. The button to launch it will be in
188the program's main menu, under "New" or something similar, titled something
189like "Add account" or "New/Existing email account."</dd>
190
191<dt>The wizard can't find my account or isn't downloading my mail</dt>
192<dd>Before searching the Web, we recommend you start by asking other people
193who use your email system, to figure out the correct settings.</dd>
194
b7f7b4a2 195<dt>I can't find the menu</dt>
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196<dd>In many new email programs, the main menu is represented by an image of
197three stacked horizontal bars.</dd>
198
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199<dt class="feedback">Don't see a solution to your problem?</dt>
200<dd class="feedback">Please let us know on the <a
201href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
202page</a>.</dd>
203</dl>
204
205</div><!-- /.troubleshooting -->
206</div><!-- End .main -->
207</div><!-- End #step1-a .step -->
208
209<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
210<div id="step-1b" class="step">
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211<div class="main">
212
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213<h3><em>Step 1.b</em> Install GnuPG</h3>
214
215<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>
19bce4d7 216
63fe86d5 217<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>
19bce4d7 218
37d0bc33 219<!-- ~~~~~~~~~ MACOS ~~~~~~~~~ -->
220<div class="troubleshooting">
19bce4d7 221
77aea16c 222<h4>macOS</h4>
64af8734 223
37d0bc33 224<dl>
225<dt>Use a third-party package manager to install GnuPG</dt>
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226<dd>
227<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>
228
229<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>
230<p># Then install GnuPG by entering the following code in Terminal:<br/>
231<code>brew install gnupg gnupg2</code></p>
232</dd>
37d0bc33 233</dl>
234
235</div><!-- /.troubleshooting -->
236
237<!-- ~~~~~~~~~ WINDOWS ~~~~~~~~~ -->
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238<div class="troubleshooting">
239
37d0bc33 240<h4>Windows</h4>
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241
242<dl>
37d0bc33 243<dt>Get GnuPG by downloading GPG4Win</dt>
b4a6695d 244<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>
37d0bc33 245</dd>
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246</dl>
247
248</div><!-- /.troubleshooting -->
249</div><!-- End .main -->
37d0bc33 250</div><!-- End #step1-b .step -->
251
80b64e11 252<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
253<div id="terminology" class="step">
254<div class="main">
255
a4eb3926 256<h3>GnuPG, OpenPGP, what?</h3>
80b64e11 257
258<p>In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP
259are used interchangeably. Technically, OpenPGP (Pretty Good Privacy) is the
260encryption standard, and GNU Privacy Guard (often shortened to GPG or GnuPG)
261is 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>
262
263</div><!-- End .main -->
264</div><!-- End #terminology.step-->
265
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266</div></section><!-- End #section1 -->
267
268<!-- ~~~~~~~~~ Section 2: Make your keys ~~~~~~~~~ -->
7b83f7f9 269<section id="section2" class="row"><div>
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270
271<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
272<div class="section-intro">
273
274<h2><em>#2</em> Make your keys</h2>
69e314de 275<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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276
277<p>To use the GnuPG system, you'll need a public key and a private key (known
278together as a keypair). Each is a long string of randomly generated numbers
279and letters that are unique to you. Your public and private keys are linked
280together by a special mathematical function.</p>
281
282<p>Your public key isn't like a physical key, because it's stored in the open
283in an online directory called a keyserver. People download it and use it,
284along with GnuPG, to encrypt emails they send to you. You can think of the
285keyserver as a phonebook; people who want to send you encrypted email can
286look up your public key.</p>
287
288<p>Your private key is more like a physical key, because you keep it to
289yourself (on your computer). You use GnuPG and your private key together to
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290descramble encrypted emails other people send to you. <strong>You should never share your private key with anyone, under any
291circumstances.</strong></p>
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292
293<p>In addition to encryption and decryption, you can also use these keys to
294sign messages and check the authenticity of other people's signatures. We'll
295discuss this more in the next section.</p>
296
297</div><!-- End .section-intro -->
298
299<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
300<div id="step-2a" class="step">
301<div class="sidebar">
69e314de 302<p class="large"><img
14c5f099 303src="../static/img/en/screenshots/step2a-02-make-keypair.png"
35f08087 304alt="Step 2.A: Make your Keypair" /></p>
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305
306<p class="large"><img
14c5f099 307src="../static/img/en/screenshots/step2a-03-make-keypair.png"
7b83f7f9 308alt="Step 2.A: Set your passphrase" /></p>
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309
310</div><!-- /.sidebar -->
311<div class="main">
312
313<h3><em>Step 2.a</em> Make a keypair</h3>
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314
315<h4>Make your keypair</h4>
19bce4d7 316
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317<p>We will use the command line in a terminal to create a keypair using the
318GnuPG program.</p>
19bce4d7 319
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320<p class="notes">Whether on GNU/Linux, macOS or Windows, you can launch your
321terminal ("Terminal" in macOS, "PowerShell" in Windows) from the Applications
322menu (some GNU/Linux systems respond to the <kbd>Ctrl + Alt + T</kbd>
323shortcut).</p>
324
325<p># Enter <code>gpg --full-generate-key</code> to start the process.</p>
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326<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>
327<p># Enter the following keysize: <code>4096</code> for a strong key.</p>
63fe86d5 328<p># Choose the expiration date; we suggest <code>2y</code> (2 years).</p>
e59c77da 329<p>Follow the prompts to continue setting up with your personal details.</p>
9162eaf3 330<p class="notes"> Depending on your version of GPG, you may need to use
67e74fa7 331<code>--gen-key</code> instead of <code>--full-generate-key</code>&#65279;.</p>
06c4f670 332<p>You can set further options by running <code>gpg --edit-key [your@email]</code> in a
88f58b8d 333terminal window.</p>
19bce4d7 334
77aea16c 335<h4>Set your passphrase</h4>
5440702c 336<p>On the screen titled "Passphrase," pick a strong passphrase! You can
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337do it manually, or you can use the Diceware method. Doing it manually
338is faster but not as secure. Using Diceware takes longer and requires
5440702c 339dice, but creates a passphrase that is much harder for attackers to figure
19bce4d7 340out. To use it, read the section "Make a secure passphrase with Diceware" in <a
f211d856 341href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">
7b83f7f9 342this article</a> by Micah Lee.</p>
343
19bce4d7 344
7b83f7f9 345<p>If you'd like to pick a passphrase manually, come up with something
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346you can remember which is at least twelve characters long, and includes
347at least one lower case and upper case letter and at least one number or
5440702c 348punctuation symbol. Never pick a passphrase you've used elsewhere. Don't use
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349any recognizable patterns, such as birthdays, telephone numbers, pets' names,
350song lyrics, quotes from books, and so on.</p>
351
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352<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
353<div class="troubleshooting">
354
355<h4>Troubleshooting</h4>
19bce4d7 356<dl>
e59c77da 357<dt>GnuPG is not installed</dt>
7b83f7f9 358<dd>
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359You can check if this is the case with the command <code>gpg --version</code>&#65279;.
360If 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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361<samp>Command 'gpg' not found, but can be installed with:
362 sudo apt install gnupg</samp>. Follow that command and install the program.</dd>
7b83f7f9 363
061aad83 364<dt><i>gpg --full-generate-key</i> command not working</dt>
412a3134 365<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 />
061aad83 366<code>sudo apt update</code><br />
367<code>sudo apt install gnupg2</code><br />
368<code>gpg2 --full-generate-key</code><br />
a7ba22c6 369If this resolved the issue, you need to continue to use the gpg2 identifier instead of gpg throughout the following steps of the guide.
9162eaf3 370<p class="notes"> Depending on your version of GPG, you may need to use
67e74fa7 371<code>--gen-key</code> instead of <code>--full-generate-key</code>&#65279;.</p>
9162eaf3 372</dd>
061aad83 373
7b83f7f9 374<dt>I took too long to create my passphrase</dt>
b7f7b4a2 375<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>
19bce4d7 376
b7f7b4a2 377<dt>How can I see my key?</dt>
7b83f7f9 378<dd>
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379Use 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 />
380If you want to see only your key, you can use <code>gpg --list-key [your@email]</code>&#65279;.<br />
77aea16c 381You can also use <code>gpg --list-secret-key</code> to see your own private key.</dd>
19bce4d7 382
19bce4d7 383<dt>More resources</dt>
7b83f7f9 384<dd>For more information about this process, you can also refer to <a
385href="https://www.gnupg.org/gph/en/manual/c14.html#AEN25">The GNU Privacy
386Handbook</a>. Make sure you stick with "RSA and RSA" (the default),
387because it's newer and more secure than the algorithms the documentation
63fe86d5 388recommends. Also make sure your key is at least 4096&nbsp;bits if you
80b64e11 389want to be secure.</dd>
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390
391<dt class="feedback">Don't see a solution to your problem?</dt>
392<dd class="feedback">Please let us know on the <a
393href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
394page</a>.</dd>
395</dl>
396
397</div><!-- /.troubleshooting -->
398
399<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
400<div class="troubleshooting">
401
402<h4>Advanced</h4>
19bce4d7 403<dl>
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404<dt>Advanced key pairs</dt>
405<dd>When GnuPG creates a new keypair, it compartmentalizes
406the encryption function from the signing function through <a
407href="https://wiki.debian.org/Subkeys">subkeys</a>. If you use
7b83f7f9 408subkeys carefully, you can keep your GnuPG identity more
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409secure and recover from a compromised key much more quickly. <a
410href="https://alexcabal.com/creating-the-perfect-gpg-keypair/">Alex Cabal</a>
6003a573 411and <a href="https://keyring.debian.org/creating-key.html">the Debian wiki</a>
19bce4d7 412provide good guides for setting up a secure subkey configuration.</dd>
64f8f564 413</dl>
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414
415</div><!-- /.troubleshooting -->
416</div><!-- End .main -->
417</div><!-- End #step-2a .step -->
418
419<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
420<div id="step-2b" class="step">
7b83f7f9 421<div class="sidebar">
69e314de 422<p class="large"><img
14c5f099 423src="../static/img/en/screenshots/step2b-04-upload-and-certificate.png"
80b64e11 424alt="Step 2.B: Send to server and generate a certificate" /></p>
19bce4d7 425
7b83f7f9 426</div><!-- /.sidebar -->
427<div class="main">
19bce4d7 428
7b83f7f9 429<h3><em>Step 2.b</em> Some important steps following creation</h3>
19bce4d7 430
77aea16c 431<h4>Upload your key to a keyserver</h4>
7b83f7f9 432<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
9c973564 433that you can select from the menu when you upload, but they are mostly all copies
434of 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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435<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>
436<p># Upload your key to a server:
437<code>gpg --send-key [keyID]</code></p>
7b83f7f9 438
77aea16c 439<h4>Export your key to a file</h4>
4f41943f 440<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>
77aea16c 441<p><code>
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442$ gpg --export-secret-keys -a [keyID] > my_secret_key.asc<br/>
443$ gpg --export -a [keyID] > my_public_key.asc
77aea16c 444</code></p>
7b83f7f9 445
77aea16c 446<h4>Generate a revocation certificate</h4>
63fe86d5 447<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>
b7f7b4a2 448
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449<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>
450<p># Generate a revocation certificate: <code>gpg --gen-revoke --output revoke.asc [keyID]</code></p>
451<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>
63fe86d5 452<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>
80b64e11 453
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454
455<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
456<div class="troubleshooting">
457
458<h4>Troubleshooting</h4>
459
460<dl>
563fcf5d 461<dt>Sending my key to the keyserver is not working</dt>
412a3134 462<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>
563fcf5d 463
b7f7b4a2 464<dt>My key doesn't seem to be working or I get a "permission denied."</dt>
e4fa2e82 465<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>
19bce4d7 466
77aea16c 467<p># Check your permissions: <code>ls -l ~/.gnupg/*</code></p>
e4fa2e82 468<p># Set permissions to read, write, execute for only yourself, no others. These are the recommended permissions for your folder. <br/>
5440702c 469You can use the command: <code>chmod 700 ~/.gnupg</code></p>
e4fa2e82 470<p># Set permissions to read and write for yourself only, no others. These are the recommended permissions for the keys inside your folder. <br/>
77aea16c 471You can use the code: <code>chmod 600 ~/.gnupg/*</code></p>
19bce4d7 472
e4fa2e82 473<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>
7b83f7f9 474</dd>
412a3134 475
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476<dt class="feedback">Don't see a solution to your problem?</dt>
477<dd class="feedback">Please let us know on the <a
478href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
479page</a>.</dd>
480</dl>
481
482</div><!-- /.troubleshooting -->
483
484<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
485<div class="troubleshooting">
486
487<h4>Advanced</h4>
488
489<dl>
7b83f7f9 490<dt>More about keyservers</dt>
f1ff80d1 491<dd>You can find some more keyserver information <a
4c633adb 492href="https://www.gnupg.org/gph/en/manual/x457.html">in this manual</a>. You can also <a
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493href="https://www.gnupg.org/gph/en/manual/x56.html#AEN64">directly export
494your key</a> as a file on your computer.</dd>
7b83f7f9 495
496<dt>Transferring your keys</dt>
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497<dd>
498<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>
7b83f7f9 499
77aea16c 500<p><code>
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501$ gpg --export-secret-keys -a [keyID] > my_private_key.asc<br />
502$ gpg --export -a [keyID] > my_public_key.asc<br />
503$ gpg --import my_private_key.asc<br />
e4fa2e82 504$ gpg --import my_public_key.asc
77aea16c 505</code></p>
7b83f7f9 506
35f08087 507<p>Ensure that the keyID printed is the correct one, and if so, then go ahead and add ultimate trust for it:</p>
e4fa2e82 508
77aea16c 509<p><code>
35f08087 510$ gpg --edit-key [your@email]
77aea16c 511</code></p>
7b83f7f9 512
dbfeba09 513<p>Because this is your key, you should choose <code>ultimate</code>&#65279;. You shouldn't trust anyone else's key ultimately.</p>
80b64e11 514
63fe86d5 515<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>
7b83f7f9 516</dd>
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517</dl>
518
519</div><!-- /.troubleshooting -->
520</div><!-- End .main -->
521</div><!-- End #step-2b .step -->
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522</div></section><!-- End #section2 -->
523
7b83f7f9 524<!-- ~~~~~~~~~ Section 3: Set up email encryption ~~~~~~~~~ -->
525<section id="section3" class="row"><div>
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526
527<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
528<div class="section-intro">
529
7b83f7f9 530<h2><em>#3</em> Set up email encryption</h2>
64f8f564 531<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>
7b83f7f9 532
533</div><!-- End .section-intro -->
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534
535<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 536<div id="step-3a" class="step">
537<div class="sidebar">
538
69e314de 539<p class="large"><img src="../static/img/en/screenshots/step3a-open-key-manager.png"
fedfd572 540alt="Step 3.A: Email Menu" /></p>
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541
542<p class="large"><img src="../static/img/en/screenshots/step3a-import-from-file.png"
7b83f7f9 543alt="Step 3.A: Import From File" /></p>
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544
545<p class="large"><img src="../static/img/en/screenshots/step3a-success.png"
7b83f7f9 546alt="Step 3.A: Success" /></p>
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547
548<p class="large"><img src="../static/img/en/screenshots/step3a-troubleshoot.png"
40833450 549alt="Step 3.A: Troubleshoot" /></p>
7b83f7f9 550</div><!-- /.sidebar -->
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551<div class="main">
552
7b83f7f9 553<h3><em>Step 3.a</em> Set up your email with encryption</h3>
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554
555<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>
19bce4d7 556
fb4dff9b 557<p># Open your email client and use "Tools" &rarr; <i>OpenPGP Key Manager</i></p>
77aea16c 558<p># Under "File" &rarr; <i>Import Secret Key(s) From File</i></p>
63fe86d5 559<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>
7b83f7f9 560<p># Unlock with your passphrase</p>
561<p># You will receive a "OpenPGP keys successfully imported" window to confirm success</p>
fb4dff9b 562<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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563
564</div><!-- End .main -->
19bce4d7 565
7b83f7f9 566<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
7b83f7f9 567<div class="main">
568<div class="troubleshooting">
569<h4>Troubleshooting</h4>
570<dl>
571<dt>I'm not sure the import worked correctly</dt>
572<dd>
fb4dff9b 573Look 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.
7b83f7f9 574</dd>
575
576<dt class="feedback">Don't see a solution to your problem?</dt>
577<dd class="feedback">Please let us know on the <a
578href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
579page</a>.</dd>
580</dl>
581
582</div><!-- /.troubleshooting -->
583</div><!-- End .main -->
584</div><!-- End #step3-a .step -->
585</div></section><!-- End #section3 -->
586
587<!-- ~~~~~~~~~ Section 4: Try it out ~~~~~~~~~ -->
588<section class="row" id="section4"><div>
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589
590<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
591<div class="section-intro">
592
7b83f7f9 593<h2><em>#4</em> Try it out!</h2>
69e314de 594<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>
a4eb3926 595<p>Now you'll try a test correspondence with an FSF computer program named Edward,
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596who knows how to use encryption. Except where noted, these are the same
597steps you'd follow when corresponding with a real, live person.</p>
598
599<!-- <p>NOTE: Edward is currently having some technical difficulties, so he
600may take a long time to respond, or not respond at all. We're sorry about
601this and we're working hard to fix it. Your key will still work even without
602testing with Edward.</p> -->
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603
604<div style="clear: both"></div>
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605</div><!-- End .section-intro -->
606
607<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 608<div id="step-4a" class="step">
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609<div class="sidebar">
610
69e314de 611<p class="large"><img
14c5f099 612src="../static/img/en/screenshots/step4a-send-key-to-Edward.png"
7b83f7f9 613alt="Step 4.A Send key to Edward." /></p>
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614
615</div><!-- /.sidebar -->
616<div class="main">
617
7b83f7f9 618<h3><em>Step 4.a</em> Send Edward your public key</h3>
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619
620<p>This is a special step that you won't have to do when corresponding
7b83f7f9 621with real people. In your email program's menu, go to "Tools" &rarr; "OpenPGP Key
a4eb3926 622Manager." You should see your key in the list that pops up. Right click
77aea16c 623on 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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624
625<p>Address the message to <a
626href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Put at least one word
627(whatever you want) in the subject and body of the email. Don't send yet.</p>
628
77aea16c 629<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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630
631<p class="notes">It may take two or three minutes for Edward to
632respond. In the meantime, you might want to skip ahead and check out the <a
b7f7b4a2 633href="#section6">Use it Well</a> section of this guide. Once you have received a response,
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634head to the next step. From here on, you'll be doing just the same thing as
635when corresponding with a real person.</p>
636
7b83f7f9 637<p>When you open Edward's reply, GnuPG may prompt you for your passphrase
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638before using your private key to decrypt it.</p>
639
640</div><!-- End .main -->
7b83f7f9 641</div><!-- End #step-4a .step -->
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642
643<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 644<div id="step-4b" class="step">
645<div class="sidebar">
19bce4d7 646
69e314de 647<p class="large"><img
14c5f099 648src="../static/img/en/screenshots/step4b-option1-verify-key.png"
7b83f7f9 649alt="Step 4.B Option 1. Verify key" /></p>
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650
651<p class="large"><img
14c5f099 652src="../static/img/en/screenshots/step4b-option2-import-key.png"
7b83f7f9 653alt="Step 4.B Option 2. Import key" /></p>
654</div><!-- /.sidebar -->
19bce4d7 655
7b83f7f9 656<div class="main">
19bce4d7 657
7b83f7f9 658<h3><em>Step 4.b</em> Send a test encrypted email</h3>
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659
660<h4>Get Edward's key</h4>
661
80b64e11 662<p>To encrypt an email to Edward, you need its public key, so now you'll have
7b83f7f9 663to download it from a keyserver. You can do this in two different ways:</p>
fb4dff9b 664<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>
19bce4d7 665
fb4dff9b 666<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>
19bce4d7 667
77aea16c 668<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>
19bce4d7 669
b7f7b4a2 670<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>
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671
672<p class="notes">Since you encrypted this email with Edward's public key,
673Edward's private key is required to decrypt it. Edward is the only one with
80b64e11 674its private key, so no one except Edward can decrypt it.</p>
19bce4d7 675
77aea16c 676<h4>Send Edward an encrypted email</h4>
7b83f7f9 677
a4eb3926 678<p> Write a new email in your email program, addressed to <a
7b83f7f9 679href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Make the subject
680"Encryption test" or something similar and write something in the body.</p>
681
77aea16c 682<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>
7b83f7f9 683
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684
685<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
686<div class="troubleshooting">
687
688<h4>Troubleshooting</h4>
689
690<dl>
7b83f7f9 691<dt>"Recipients not valid, not trusted or not found"</dt>
412a3134 692<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>
7b83f7f9 693
694<dt>Unable to send message</dt>
f1ff80d1 695<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 "Not accepted (undecided)" 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>
7b83f7f9 696
697<dt>I can't find Edward's key</dt>
19bce4d7 698<dd>Close the pop-ups that have appeared since you clicked Send. Make sure
412a3134 699you 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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700
701<dt>Unscrambled messages in the Sent folder</dt>
702<dd>Even though you can't decrypt messages encrypted to someone else's key,
703your email program will automatically save a copy encrypted to your public key,
704which you'll be able to view from the Sent folder like a normal email. This
705is normal, and it doesn't mean that your email was not sent encrypted.</dd>
706
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707<dt class="feedback">Don't see a solution to your problem?</dt>
708<dd class="feedback">Please let us know on the <a
709href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
710page</a>.</dd>
711</dl>
712
713</div><!-- /.troubleshooting -->
714
715<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
716<div class="troubleshooting">
717
718<h4>Advanced</h4>
719
720<dl>
721<dt>Encrypt messages from the command line</dt>
722<dd>You can also encrypt and decrypt messages and files from the <a
723href="https://www.gnupg.org/gph/en/manual/x110.html">command line</a>,
724if that's your preference. The option --armor makes the encrypted output
725appear in the regular character set.</dd>
726</dl>
727
728</div><!-- /.troubleshooting -->
729</div><!-- End .main -->
7b83f7f9 730</div><!-- End #step-4b .step -->
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731
732<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
733<div id="step-headers_unencrypted" class="step">
734<div class="main">
735
736<h3><em>Important:</em> Security tips</h3>
19e80165 737
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738<p>Even if you encrypt your email, the subject line is not encrypted, so
739don't put private information there. The sending and receiving addresses
740aren't encrypted either, so a surveillance system can still figure out who
741you're communicating with. Also, surveillance agents will know that you're
742using GnuPG, even if they can't figure out what you're saying. When you
7b83f7f9 743send attachments, you can choose to encrypt them or not,
19bce4d7 744independent of the actual email.</p>
bdf319c4 745
e72398d7
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746<p>For greater security against potential attacks, you can turn off
747HTML. Instead, you can render the message body as plain text. In order
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748to do this in Icedove or Thunderbird, go to "View" &rarr; "Message Body As" &rarr; <i>Plain
749Text</i>.</p>
e72398d7 750
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751</div><!-- End .main -->
752</div><!-- End #step-headers_unencrypted .step-->
d85363e7 753
19bce4d7 754<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 755<div id="step-4c" class="step">
756<div class="sidebar">
757
69e314de 758<p class="large"><img
14c5f099 759src="../static/img/en/screenshots/step4c-Edward-response.png"
7b83f7f9 760alt="Step 4.C Edward's response" /></p>
761
762</div><!-- /.sidebar -->
763
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764<div class="main">
765
7b83f7f9 766<h3><em>Step 4.c</em> Receive a response</h3>
19bce4d7 767
80b64e11 768<p>When Edward receives your email, it will use its private key to decrypt
f54f2134 769it, then reply to you. </p>
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770
771<p class="notes">It may take two or three minutes for Edward to
772respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 773href="#section6">Use it Well</a> section of this guide.</p>
774
169c7097 775<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>
7b83f7f9 776
f2545138 777<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>
19bce4d7 778
19bce4d7 779</div><!-- End .main -->
7b83f7f9 780</div><!-- End #step-4c .step -->
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781
782<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 783<div id="step-4d" class="step">
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784<div class="main">
785
80b64e11 786<h3><em>Step 4.d</em> Send a signed test email</h3>
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787
788<p>GnuPG includes a way for you to sign messages and files, verifying that
789they came from you and that they weren't tampered with along the way. These
790signatures are stronger than their pen-and-paper cousins -- they're impossible
791to forge, because they're impossible to create without your private key
792(another reason to keep your private key safe).</p>
793
794<p>You can sign messages to anyone, so it's a great way to make people
795aware that you use GnuPG and that they can communicate with you securely. If
796they don't have GnuPG, they will be able to read your message and see your
797signature. If they do have GnuPG, they'll also be able to verify that your
798signature is authentic.</p>
799
a4eb3926 800<p>To sign an email to Edward, compose any message to the email address and click the
19bce4d7 801pencil icon next to the lock icon so that it turns gold. If you sign a
5440702c 802message, GnuPG may ask you for your passphrase before it sends the message,
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803because it needs to unlock your private key for signing.</p>
804
77aea16c 805<p>In "Account Settings" &rarr; "End-To-End-Encryption" you can opt to <i>add digital signature by default</i>.</p>
19bce4d7 806
7b83f7f9 807</div><!-- End .main -->
808</div><!-- End #step-4d .step -->
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809
810<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 811<div id="step-4e" class="step">
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812<div class="main">
813
7b83f7f9 814<h3><em>Step 4.e</em> Receive a response</h3>
19bce4d7 815
f54f2134
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816<p>When Edward receives your email, he will use your public key (which
817you sent him in <a href="#step-3a">Step 3.A</a>) to verify the message
80b64e11 818you sent has not been tampered with and to encrypt a reply to you.</p>
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819
820<p class="notes">It may take two or three minutes for Edward to
821respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 822href="#section6">Use it Well</a> section of this guide.</p>
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823
824<p>Edward's reply will arrive encrypted, because he prefers to use encryption
825whenever possible. If everything goes according to plan, it should say
826"Your signature was verified." If your test signed email was also encrypted,
827he will mention that first.</p>
828
7b83f7f9 829<p>When you receive Edward's email and open it, your email client will
f54f2134
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830automatically detect that it is encrypted with your public key, and
831then it will use your private key to decrypt it.</p>
832
19bce4d7 833</div><!-- End .main -->
7b83f7f9 834</div><!-- End #step-4e .step -->
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835</div></section>
836
803e8e2e 837<!-- ~~~~~~~~~ Section 5: Learn About the Web of Trust ~~~~~~~~~ -->
7b83f7f9 838<section class="row" id="section5"><div>
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839
840<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
841<div class="section-intro">
842
b7f7b4a2 843<h2><em>#5</em> Learn about the Web of Trust</h2>
69e314de 844<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>
19bce4d7 845
b7f7b4a2 846<p>Email encryption is a powerful technology, but it has a weakness:
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847it requires a way to verify that a person's public key is actually
848theirs. Otherwise, there would be no way to stop an attacker from making
b7f7b4a2 849an email address with your friend's name, creating keys to go with it, and
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850impersonating your friend. That's why the free software programmers that
851developed email encryption created keysigning and the Web of Trust.</p>
852
853<p>When you sign someone's key, you are publicly saying that you've verified
854that it belongs to them and not someone else.</p>
855
856<p>Signing keys and signing messages use the same type of mathematical
857operation, but they carry very different implications. It's a good practice
858to generally sign your email, but if you casually sign people's keys, you
77aea16c 859may accidentally end up vouching for the identity of an imposter.</p>
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860
861<p>People who use your public key can see who has signed it. Once you've
862used GnuPG for a long time, your key may have hundreds of signatures. You
863can consider a key to be more trustworthy if it has many signatures from
864people that you trust. The Web of Trust is a constellation of GnuPG users,
865connected to each other by chains of trust expressed through signatures.</p>
866
867</div><!-- End .section-intro -->
868
869<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 870<div id="step-5a" class="step">
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871<div class="sidebar">
872
69e314de 873<p class="large"><img
14c5f099 874src="../static/img/en/screenshots/step5a-key-properties.png"
7b83f7f9 875alt="Section 5: trusting a key" /></p>
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876
877</div><!-- /.sidebar -->
878<div class="main">
879
7b83f7f9 880<h3><em>Step 5.a</em> Sign a key</h3>
19bce4d7 881
77aea16c 882<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>
19bce4d7 883
f1ff80d1 884<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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885
886<p class="notes">You've just effectively said "I trust that Edward's public
887key actually belongs to Edward." This doesn't mean much because Edward isn't
b7f7b4a2 888a 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>
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889
890<!--<div id="pgp-pathfinder">
891
892<form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi"
893method="get">
894
f211d856 895<p><strong>From:</strong><input type="text" value="xD41A008"
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896name="FROM"></p>
897
f211d856 898<p><strong>To:</strong><input type="text" value="50BD01x4" name="TO"></p>
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899
900<p class="buttons"><input type="submit" value="trust paths" name="PATHS"><input
901type="reset" value="reset" name=".reset"></p>
902
903</form>
904
905</div>End #pgp-pathfinder -->
906</div><!-- End .main -->
7b83f7f9 907</div><!-- End #step-5a .step -->
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908
909<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
910<div id="step-identify_keys" class="step">
911<div class="main">
912
913<h3>Identifying keys: Fingerprints and IDs</h3>
914
915<p>People's public keys are usually identified by their key fingerprint,
916which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8
917(for Edward's key). You can see the fingerprint for your public key, and
7b83f7f9 918other public keys saved on your computer, by going to OpenPGP Key
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919Management in your email program's menu, then right clicking on the key
920and choosing Key Properties. It's good practice to share your fingerprint
921wherever you share your email address, so that people can double-check that
922they have the correct public key when they download yours from a keyserver.</p>
923
c0c01f86 924<p class="notes">You may also see public keys referred to by a shorter
a4eb3926 925keyID. This keyID is visible directly from the Key Management
926window. These eight character keyIDs were previously used for
c0c01f86
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927identification, which used to be safe, but is no longer reliable. You
928need to check the full fingerprint as part of verifying you have the
929correct key for the person you are trying to contact. Spoofing, in
930which someone intentionally generates a key with a fingerprint whose
931final eight characters are the same as another, is unfortunately
932common.</p>
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933
934</div><!-- End .main -->
935</div><!-- End #step-identify_keys .step-->
936
937<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
938<div id="check-ids-before-signing" class="step">
939<div class="main">
940
941<h3><em>Important:</em> What to consider when signing keys</h3>
942
943<p>Before signing a person's key, you need to be confident that it actually
944belongs to them, and that they are who they say they are. Ideally, this
945confidence comes from having interactions and conversations with them over
946time, and witnessing interactions between them and others. Whenever signing
947a key, ask to see the full public key fingerprint, and not just the shorter
a4eb3926 948keyID. If you feel it's important to sign the key of someone you've just
19bce4d7 949met, also ask them to show you their government identification, and make
7b83f7f9 950sure the name on the ID matches the name on the public key.</p>
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951
952<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
953<div class="troubleshooting">
954
955<h4>Advanced</h4>
956
957<dl>
958<dt>Master the Web of Trust</dt>
959<dd>Unfortunately, trust does not spread between users the way <a
6003a573 960href="https://fennetic.net/irc/finney.org/~hal/web_of_trust.html">many people
a4eb3926 961think</a>. One of the best ways to strengthen the GnuPG community is to deeply <a
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962href="https://www.gnupg.org/gph/en/manual/x334.html">understand</a> the Web of
963Trust and to carefully sign as many people's keys as circumstances permit.</dd>
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964</dl>
965
966</div><!-- /.troubleshooting -->
967</div><!-- End .main -->
968</div><!-- End #check-ids-before-signing .step-->
7b83f7f9 969</div></section><!-- End #section5 -->
d85363e7 970
7b83f7f9 971<!-- ~~~~~~~~~ Section 6: Use it well ~~~~~~~~~ -->
972<section id="section6" class="row"><div>
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973
974<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
975<div class="section-intro">
976
7b83f7f9 977<h2><em>#6</em> Use it well</h2>
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978
979<p>Everyone uses GnuPG a little differently, but it's important to follow
980some basic practices to keep your email secure. Not following them, you
981risk the privacy of the people you communicate with, as well as your own,
982and damage the Web of Trust.</p>
983
984</div><!-- End .section-intro -->
985
986<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 987<div id="step-6a" class="step">
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988<div class="sidebar">
989
69e314de 990<p class="medium"><img
1805f65d 991src="../static/img/en/screenshots/section6-01-use-it-well.png"
7b83f7f9 992alt="Section 6: Use it Well (1)" /></p>
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993
994</div><!-- /.sidebar -->
995<div class="main">
996
997<h3>When should I encrypt? When should I sign?</h3>
998
999<p>The more you can encrypt your messages, the better. If you only encrypt
1000emails occasionally, each encrypted message could raise a red flag for
1001surveillance systems. If all or most of your email is encrypted, people
1002doing surveillance won't know where to start. That's not to say that only
1003encrypting some of your email isn't helpful -- it's a great start and it
1004makes bulk surveillance more difficult.</p>
1005
1006<p>Unless you don't want to reveal your own identity (which requires other
1007protective measures), there's no reason not to sign every message, whether or
1008not you are encrypting. In addition to allowing those with GnuPG to verify
1009that the message came from you, signing is a non-intrusive way to remind
1010everyone that you use GnuPG and show support for secure communication. If you
1011often send signed messages to people that aren't familiar with GnuPG, it's
1012nice to also include a link to this guide in your standard email signature
1013(the text kind, not the cryptographic kind).</p>
1014
1015</div><!-- End .main -->
7b83f7f9 1016</div><!-- End #step-6a .step -->
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1017
1018<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1019<div id="step-6b" class="step">
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1020<div class="sidebar">
1021
69e314de 1022<p class="medium"><img
1805f65d 1023src="../static/img/en/screenshots/section6-02-use-it-well.png"
7b83f7f9 1024alt="Section 6: Use it Well (2)" /></p>
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1025
1026</div><!-- /.sidebar -->
1027<div class="main">
1028
1029<h3>Be wary of invalid keys</h3>
1030
1031<p>GnuPG makes email safer, but it's still important to watch out for invalid
1032keys, which might have fallen into the wrong hands. Email encrypted with
1033invalid keys might be readable by surveillance programs.</p>
1034
1035<p>In your email program, go back to the first encrypted email that Edward
1036sent you. Because Edward encrypted it with your public key, it will have a
f1ff80d1 1037green checkmark on the "OpenPGP" button.</p>
19bce4d7 1038
77aea16c 1039<p><strong>When using GnuPG, make a habit of glancing at that button. The program
4227f3fd 1040will warn you there if you get an email signed with a key that can't
77aea16c 1041be trusted.</strong></p>
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1042
1043</div><!-- End .main -->
7b83f7f9 1044</div><!-- End #step-6b .step -->
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1045
1046<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1047<div id="step-6c" class="step">
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1048<div class="main">
1049
1050<h3>Copy your revocation certificate to somewhere safe</h3>
1051
1052<p>Remember when you created your keys and saved the revocation certificate
80b64e11 1053that 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>
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1054
1055<p>If your private key ever gets lost or stolen, you'll need this certificate
1056file to let people know that you are no longer using that keypair.</p>
1057
1058</div><!-- End .main -->
7b83f7f9 1059</div><!-- End #step-6c .step -->
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1060
1061<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1062<div id="step-lost_key" class="step">
1063<div class="main">
1064
b7f7b4a2 1065<h3><em>IMPORTANT:</em> ACT SWIFTLY if someone gets your private key</h3>
19bce4d7 1066
b7f7b4a2 1067<p>If you lose your private key or someone else gets a hold
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1068of it (say, by stealing or cracking your computer), it's
1069important to revoke it immediately before someone else uses
1070it to read your encrypted email or forge your signature. This
1071guide doesn't cover how to revoke a key, but you can follow these <a
1072href="https://www.hackdiary.com/2004/01/18/revoking-a-gpg-key/">instructions</a>.
1073After you're done revoking, make a new key and send an email to everyone
1074with whom you usually use your key to make sure they know, including a copy
1075of your new key.</p>
1076
1077</div><!-- End .main -->
1078</div><!-- End #step-lost_key .step-->
1079
35f08087 1080<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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1081<div id="webmail-and-GnuPG" class="step">
1082<div class="main">
1083
1084<h3>Webmail and GnuPG</h3>
1085
1086<p>When you use a web browser to access your email, you're using webmail,
1087an email program stored on a distant website. Unlike webmail, your desktop
1088email program runs on your own computer. Although webmail can't decrypt
1089encrypted email, it will still display it in its encrypted form. If you
1090primarily use webmail, you'll know to open your email client when you receive
1091a scrambled email.</p>
1092
1093</div><!-- End .main -->
1094</div><!-- End #webmail-and-GnuPG .step-->
1095
35f08087 1096<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1097<div id="step-6d" class="step">
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1098<div class="main">
1099
1100<h3>Make your public key part of your online identity</h3>
1101
1102<p> First add your public key fingerprint to your email signature, then
1103compose an email to at least five of your friends, telling them you just
1104set up GnuPG and mentioning your public key fingerprint. Link to this guide
1105and ask them to join you. Don't forget that there's also an awesome <a
1106href="infographic.html">infographic to share.</a></p>
1107
1108<p class="notes">Start writing your public key fingerprint anywhere someone
1109would see your email address: your social media profiles, blog, Website,
1110or business card. (At the Free Software Foundation, we put ours on our
1111<a href="https://fsf.org/about/staff">staff page</a>.) We need to get our
1112culture to the point that we feel like something is missing when we see an
1113email address without a public key fingerprint.</p>
1114
35f08087 1115</div><!-- End .main-->
1116</div><!-- End #step-6d .step-->
7b83f7f9 1117</div></section><!-- End #section6 -->
19bce4d7 1118
7b83f7f9 1119<!-- ~~~~~~~~~ Section 7: Next steps ~~~~~~~~~ -->
b7f7b4a2 1120<section class="row" id="section7">
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1121<div id="step-click_here" class="step">
1122<div class="main">
0a225228 1123
19bce4d7 1124<h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
bb28ee32 1125
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1126</div><!-- End .main -->
1127</div><!-- End #step-click_here .step-->
7b83f7f9 1128</section><!-- End #section7 -->
bdf319c4 1129
19bce4d7 1130<!-- ~~~~~~~~~ FAQ ~~~~~~~~~ -->
f44dd62f 1131<!-- When un-commenting this section go to main.css and search
116f80c3 1132for /* Guide Sections Background */ then add #faq to the desired color
19bce4d7 1133<section class="row" id="faq"><div>
116f80c3 1134<div class="sidebar">
19bce4d7 1135
116f80c3 1136<h2>FAQ</h2>
6c495e2d 1137
19bce4d7 1138</div>
116f80c3 1139<div class="main">
19bce4d7 1140
116f80c3
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1141<dl>
1142<dt>My key expired</dt>
1143<dd>Answer coming soon.</dd>
6c495e2d 1144
116f80c3
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1145<dt>Who can read encrypted messages? Who can read signed ones?</dt>
1146<dd>Answer coming soon.</dd>
6c495e2d 1147
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1148<dt>My email program is opening at times I don't want it to open/is now my
1149default program and I don't want it to be.</dt>
116f80c3
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1150<dd>Answer coming soon.</dd>
1151</dl>
19bce4d7 1152
116f80c3
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1153</div>
1154</div>
1155</section> --><!-- End #faq -->
bdf319c4 1156
19bce4d7
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1157<!-- ~~~~~~~~~ Footer ~~~~~~~~~ -->
1158<footer class="row" id="footer"><div>
1159<div id="copyright">
1160
1161<h4><a href="https://u.fsf.org/ys"><img
1162alt="Free Software Foundation"
14c5f099 1163src="../static/img/fsf-logo.png" /></a></h4>
19bce4d7 1164
bf77c8b0 1165<p>Copyright &copy; 2014-2023 <a
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1166href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a
1167href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. Please
1168support our work by <a href="https://u.fsf.org/yr">joining us as an associate
1169member.</a></p>
1170
1171<p>The images on this page are under a <a
1172href="https://creativecommons.org/licenses/by/4.0/">Creative Commons
1173Attribution 4.0 license (or later version)</a>, and the rest of it is under
1174a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons
1175Attribution-ShareAlike 4.0 license (or later version)</a>. Download the <a
6003a573 1176href="https://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">
f211d856 1177source code of Edward reply bot</a> by Andrew Engelbrecht
a3a9a0ac 1178&lt;andrew@engelbrecht.io&gt; and Josh Drake &lt;zamnedix@gnu.org&gt;,
19bce4d7 1179available under the GNU Affero General Public License. <a
6003a573 1180href="https://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these
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1181licenses?</a></p>
1182
1183<p>Fonts used in the guide &amp; infographic: <a
1184href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo
6003a573 1185Impallari, <a href="https://www.google.com/fonts/specimen/Signika">Signika</a>
19bce4d7 1186by Anna Giedry&#347;, <a
6003a573 1187href="https://www.google.com/fonts/specimen/Archivo+Narrow">Archivo
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1188Narrow</a> by Omnibus-Type, <a
1189href="https://libreplanet.org/wiki/GPG_guide/Graphics_Howto#Pitfalls">PXL-2000</a>
1190by Florian Cramer.</p>
1191
1192<p>Download the <a href="emailselfdefense_source.zip">source package</a>
1193for this guide, including fonts, image source files and the text of Edward's
1194messages.</p>
1195
1196<p>This site uses the Weblabels standard for labeling <a
1197href="https://www.fsf.org/campaigns/freejs">free JavaScript</a>. View
abf30801 1198the JavaScript <a href="https://weblabels.fsf.org/emailselfdefense.fsf.org/"
19bce4d7
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1199rel="jslicense">source code and license information</a>.</p>
1200
1201</div><!-- /#copyright -->
1202
1203<p class="credits">Infographic and guide design by <a rel="external"
6003a573 1204href="https://jplusplus.org"><strong>Journalism++</strong><img
e277af54 1205src="../static/img/jplusplus.png"
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1206alt="Journalism++" /></a></p><!-- /.credits -->
1207</div></footer><!-- End #footer -->
116f80c3 1208
116f80c3 1209
f211d856 1210<script type="text/javascript"
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e609e128 1215<script type="text/javascript">
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e609e128
AE
1217 var _paq = _paq || [];
1218 _paq.push(["trackPageView"]);
1219 _paq.push(["enableLinkTracking"]);
1220
1221 (function() {
1222 var u = (("https:" == document.location.protocol) ? "https" : "http") + "://"+"piwik.fsf.org//";
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1225 var d=document, g=d.createElement("script"), s=d.getElementsByTagName("script")[0]; g.type="text/javascript";
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