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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" />
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e59c77da 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to Enigmail's PGP functionality being migrated into Icedove and Thunderbird, steps 2 and 3 of the guide are currently out of date.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>-->
0e203e6f 19
f12cd56f 20<!-- PLACE FUNDRAISER MODAL WINDOW HERE -->
aa082aba 21
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22<!-- ~~~~~~~~~ GnuPG Header and introduction text ~~~~~~~~~ -->
23<header class="row" id="header"><div>
116f80c3 24
e59c77da 25
19bce4d7 26<h1>Email Self-Defense</h1>
116f80c3 27
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28<!-- Language list for browsers that do not have JS enabled -->
29<ul id="languages" class="os">
de17dfbe 30<li><a class="current" href="/en">English - v5.0</a></li>
7c252a78 31<li><a href="/es">español - v5.0</a></li>
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32<li><a href="/fr">français - v5.0</a></li>
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46<li><strong><a href="https://libreplanet.org/wiki/GPG_guide/Translation_Guide">
47Translate!</a></strong></li>
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48</ul>
49
50<ul id="menu" class="os">
37d0bc33 51<li class="spacer"><a href="index.html" class="current">Set up guide</a></li>
52<!--<li><a href="mac.html">Mac OS</a></li>-->
53<!--<li><a href="windows.html">Windows</a></li>-->
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54<li class="spacer"><a href="workshops.html">Teach your friends</a></li>
55<li class="spacer"><a
770452f9 56href="https://fsf.org/share?u=https://u.fsf.org/zb&amp;t=Email%20encryption%20for%20everyone%20via%20%40fsf">
f211d856 57Share&nbsp;
14c5f099 58<img src="../static/img/gnu-social.png" class="share-logo"
19bce4d7 59alt="[GNU Social]" />&nbsp;
14c5f099 60<img src="../static/img/mastodon.png" class="share-logo"
d06ce723 61alt="[Mastodon]" />&nbsp;
14c5f099 62<img src="../static/img/reddit-alien.png" class="share-logo"
19bce4d7 63alt="[Reddit]" />&nbsp;
14c5f099 64<img src="../static/img/hacker-news.png" class="share-logo"
f211d856 65alt="[Hacker News]" /></a></li>
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66</ul>
67
68<!-- ~~~~~~~~~ FSF Introduction ~~~~~~~~~ -->
69<div id="fsf-intro">
70
6003a573 71<h3><a href="https://u.fsf.org/ys"><img
19bce4d7 72alt="Free Software Foundation"
14c5f099 73src="../static/img/fsf-logo.png" />
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74</a></h3>
75
76<div class="fsf-emphasis">
77
78<p>We fight for computer users' rights, and promote the development of free (as
79in freedom) software. Resisting bulk surveillance is very important to us.</p>
80
81<p><strong>Please donate to support Email Self-Defense. We need to keep
82improving it, and making more materials, for the benefit of people around
83the world taking the first step towards protecting their privacy.</strong></p>
84
85</div>
86
87<p><a
0dacb163 88href="https://crm.fsf.org/civicrm/contribute/transact?reset=1&amp;id=14&amp;mtm_campaign=email_self_defense&amp;mtm_kwd=guide_donate"><img
19bce4d7 89alt="Donate"
14c5f099 90src="../static/img/en/donate.png" /></a></p>
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91
92</div><!-- End #fsf-intro -->
93
94<!-- ~~~~~~~~~ Guide Introduction ~~~~~~~~~ -->
95<div class="intro">
96
97<p><a id="infographic" href="infographic.html"><img
14c5f099 98src="../static/img/en/infographic-button.png"
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99alt="View &amp; share our infographic &rarr;" /></a>
100Bulk surveillance violates our fundamental rights and makes free speech
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101risky. This guide will teach you a basic surveillance self-defense skill: email
102encryption. Once you've finished, you'll be able to send and receive emails
103that are scrambled to make sure a surveillance agent or thief intercepting
104your email can't read them. All you need is a computer with an Internet
105connection, an email account, and about forty minutes.</p>
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106
107<p>Even if you have nothing to hide, using encryption helps protect the privacy
108of people you communicate with, and makes life difficult for bulk surveillance
109systems. If you do have something important to hide, you're in good company;
110these are the same tools that whistleblowers use to protect their identities
80b64e11 111while shining light on human rights abuses, corruption, and other crimes.</p>
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112
113<p>In addition to using encryption, standing up
114to surveillance requires fighting politically for a <a
e59c77da 115href="https://gnu.org/philosophy/surveillance-vs-democracy.html">reduction
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116in the amount of data collected on us</a>, but the essential first step is
117to protect yourself and make surveillance of your communication as difficult
118as possible. This guide helps you do that. It is designed for beginners, but
119if you already know the basics of GnuPG or are an experienced free software
120user, you'll enjoy the advanced tips and the <a href="workshops.html">guide
121to teaching your friends</a>.</p>
122
123</div><!-- End .intro -->
124</div></header><!-- End #header -->
125
126<!-- ~~~~~~~~~ Section 1: Get the pieces ~~~~~~~~~ -->
127<section class="row" id="section1"><div>
128
129<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
130<div class="section-intro">
131
132<h2><em>#1</em> Get the pieces</h2>
133
134<p class="notes">This guide relies on software which is <a
135href="https://www.gnu.org/philosophy/free-sw.html">freely licensed</a>;
136it's completely transparent and anyone can copy it or make their
137own version. This makes it safer from surveillance than proprietary
80b64e11 138software (like Windows or macOS). Learn more about free software at <a
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139href="https://u.fsf.org/ys">fsf.org</a>.</p>
140
c174e65c 141<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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143</div><!-- End .section-intro -->
144
145<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
146<div id="step-1a" class="step">
147<div class="sidebar">
148
69e314de 149<p class="large"><img
14c5f099 150src="../static/img/en/screenshots/step1a-install-wizard.png"
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151alt="Step 1.A: Install Wizard" /></p>
152
153</div><!-- /.sidebar -->
154<div class="main">
155
156<h3><em>Step 1.a</em> Set up your email program with your email account</h3>
157
158<p>Open your email program and follow the wizard (step-by-step walkthrough)
37d0bc33 159that 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 160
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161
162<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
163<div class="troubleshooting">
164
165<h4>Troubleshooting</h4>
166
167<dl>
168<dt>The wizard doesn't launch</dt>
169<dd>You can launch the wizard yourself, but the menu option for doing so is
170named differently in each email program. The button to launch it will be in
171the program's main menu, under "New" or something similar, titled something
172like "Add account" or "New/Existing email account."</dd>
173
174<dt>The wizard can't find my account or isn't downloading my mail</dt>
175<dd>Before searching the Web, we recommend you start by asking other people
176who use your email system, to figure out the correct settings.</dd>
177
b7f7b4a2 178<dt>I can't find the menu</dt>
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179<dd>In many new email programs, the main menu is represented by an image of
180three stacked horizontal bars.</dd>
181
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182<dt class="feedback">Don't see a solution to your problem?</dt>
183<dd class="feedback">Please let us know on the <a
184href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
185page</a>.</dd>
186</dl>
187
188</div><!-- /.troubleshooting -->
189</div><!-- End .main -->
190</div><!-- End #step1-a .step -->
191
192<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
193<div id="step-1b" class="step">
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194<div class="main">
195
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196<h3><em>Step 1.b</em> Install GnuPG</h3>
197
198<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 199
63fe86d5 200<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 201
37d0bc33 202<!-- ~~~~~~~~~ MACOS ~~~~~~~~~ -->
203<div class="troubleshooting">
19bce4d7 204
77aea16c 205<h4>macOS</h4>
64af8734 206
37d0bc33 207<dl>
208<dt>Use a third-party package manager to install GnuPG</dt>
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209<dd>
210<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>
211
212<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>
213<p># Then install GnuPG by entering the following code in Terminal:<br/>
214<code>brew install gnupg gnupg2</code></p>
215</dd>
37d0bc33 216</dl>
217
218</div><!-- /.troubleshooting -->
219
220<!-- ~~~~~~~~~ WINDOWS ~~~~~~~~~ -->
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221<div class="troubleshooting">
222
37d0bc33 223<h4>Windows</h4>
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224
225<dl>
37d0bc33 226<dt>Get GnuPG by downloading GPG4Win</dt>
b4a6695d 227<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 228</dd>
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229</dl>
230
231</div><!-- /.troubleshooting -->
232</div><!-- End .main -->
37d0bc33 233</div><!-- End #step1-b .step -->
234
80b64e11 235<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
236<div id="terminology" class="step">
237<div class="main">
238
a4eb3926 239<h3>GnuPG, OpenPGP, what?</h3>
80b64e11 240
241<p>In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP
242are used interchangeably. Technically, OpenPGP (Pretty Good Privacy) is the
243encryption standard, and GNU Privacy Guard (often shortened to GPG or GnuPG)
244is 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>
245
246</div><!-- End .main -->
247</div><!-- End #terminology.step-->
248
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249</div></section><!-- End #section1 -->
250
251<!-- ~~~~~~~~~ Section 2: Make your keys ~~~~~~~~~ -->
7b83f7f9 252<section id="section2" class="row"><div>
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253
254<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
255<div class="section-intro">
256
257<h2><em>#2</em> Make your keys</h2>
69e314de 258<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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259
260<p>To use the GnuPG system, you'll need a public key and a private key (known
261together as a keypair). Each is a long string of randomly generated numbers
262and letters that are unique to you. Your public and private keys are linked
263together by a special mathematical function.</p>
264
265<p>Your public key isn't like a physical key, because it's stored in the open
266in an online directory called a keyserver. People download it and use it,
267along with GnuPG, to encrypt emails they send to you. You can think of the
268keyserver as a phonebook; people who want to send you encrypted email can
269look up your public key.</p>
270
271<p>Your private key is more like a physical key, because you keep it to
272yourself (on your computer). You use GnuPG and your private key together to
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273descramble encrypted emails other people send to you. <strong>You should never share your private key with anyone, under any
274circumstances.</strong></p>
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275
276<p>In addition to encryption and decryption, you can also use these keys to
277sign messages and check the authenticity of other people's signatures. We'll
278discuss this more in the next section.</p>
279
280</div><!-- End .section-intro -->
281
282<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
283<div id="step-2a" class="step">
284<div class="sidebar">
69e314de 285<p class="large"><img
14c5f099 286src="../static/img/en/screenshots/step2a-02-make-keypair.png"
35f08087 287alt="Step 2.A: Make your Keypair" /></p>
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288
289<p class="large"><img
14c5f099 290src="../static/img/en/screenshots/step2a-03-make-keypair.png"
7b83f7f9 291alt="Step 2.A: Set your passphrase" /></p>
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292
293</div><!-- /.sidebar -->
294<div class="main">
295
296<h3><em>Step 2.a</em> Make a keypair</h3>
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297
298<h4>Make your keypair</h4>
19bce4d7 299
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300<p>We will use the command line in a terminal to create a keypair using the
301GnuPG program.</p>
19bce4d7 302
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303<p class="notes">Whether on GNU/Linux, macOS or Windows, you can launch your
304terminal ("Terminal" in macOS, "PowerShell" in Windows) from the Applications
305menu (some GNU/Linux systems respond to the <kbd>Ctrl + Alt + T</kbd>
306shortcut).</p>
307
308<p># Enter <code>gpg --full-generate-key</code> to start the process.</p>
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309<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>
310<p># Enter the following keysize: <code>4096</code> for a strong key.</p>
63fe86d5 311<p># Choose the expiration date; we suggest <code>2y</code> (2 years).</p>
e59c77da 312<p>Follow the prompts to continue setting up with your personal details.</p>
19bce4d7 313
77aea16c 314<h4>Set your passphrase</h4>
7b83f7f9 315<p>On the screen titled "Passphrase," pick a strong password! You can
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316do it manually, or you can use the Diceware method. Doing it manually
317is faster but not as secure. Using Diceware takes longer and requires
4d10d72d 318dice, but creates a password that is much harder for attackers to figure
19bce4d7 319out. To use it, read the section "Make a secure passphrase with Diceware" in <a
f211d856 320href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">
7b83f7f9 321this article</a> by Micah Lee.</p>
322
19bce4d7 323
7b83f7f9 324<p>If you'd like to pick a passphrase manually, come up with something
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325you can remember which is at least twelve characters long, and includes
326at least one lower case and upper case letter and at least one number or
327punctuation symbol. Never pick a password you've used elsewhere. Don't use
328any recognizable patterns, such as birthdays, telephone numbers, pets' names,
329song lyrics, quotes from books, and so on.</p>
330
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331<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
332<div class="troubleshooting">
333
334<h4>Troubleshooting</h4>
19bce4d7 335<dl>
e59c77da 336<dt>GnuPG is not installed</dt>
7b83f7f9 337<dd>
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338You can check if this is the case with the command <code>gpg --version</code>&#65279;.
339If GnuPG is not installed, it will bring up the following result on most GNU/Linux operating systems, or something like it:
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340<samp>Command 'gpg' not found, but can be installed with:
341 sudo apt install gnupg</samp>. Follow that command and install the program.</dd>
7b83f7f9 342
061aad83 343<dt><i>gpg --full-generate-key</i> command not working</dt>
412a3134 344<dd>Some distributions use a different version of GPG. When you receive an error code that is something along the lines of: <samp>gpg: Invalid option "--full-generate-key"</samp>, you can try the following commands: <br />
061aad83 345<code>sudo apt update</code><br />
346<code>sudo apt install gnupg2</code><br />
347<code>gpg2 --full-generate-key</code><br />
412a3134 348If this resolved the issue, you need to continue to use the gpg2 identifier instead of gpg throughout the following steps of the guide.</dd>
061aad83 349
7b83f7f9 350<dt>I took too long to create my passphrase</dt>
b7f7b4a2 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>
19bce4d7 352
b7f7b4a2 353<dt>How can I see my key?</dt>
7b83f7f9 354<dd>
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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 />
356If you want to see only your key, you can use <code>gpg --list-key [your@email]</code>&#65279;.<br />
77aea16c 357You can also use <code>gpg --list-secret-key</code> to see your own private key.</dd>
19bce4d7 358
19bce4d7 359<dt>More resources</dt>
7b83f7f9 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
63fe86d5 364recommends. Also make sure your key is at least 4096&nbsp;bits if you
80b64e11 365want to be secure.</dd>
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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>
19bce4d7 379<dl>
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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
7b83f7f9 384subkeys carefully, you can keep your GnuPG identity more
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385secure and recover from a compromised key much more quickly. <a
386href="https://alexcabal.com/creating-the-perfect-gpg-keypair/">Alex Cabal</a>
6003a573 387and <a href="https://keyring.debian.org/creating-key.html">the Debian wiki</a>
19bce4d7 388provide good guides for setting up a secure subkey configuration.</dd>
64f8f564 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">
7b83f7f9 397<div class="sidebar">
69e314de 398<p class="large"><img
14c5f099 399src="../static/img/en/screenshots/step2b-04-upload-and-certificate.png"
80b64e11 400alt="Step 2.B: Send to server and generate a certificate" /></p>
19bce4d7 401
7b83f7f9 402</div><!-- /.sidebar -->
403<div class="main">
19bce4d7 404
7b83f7f9 405<h3><em>Step 2.b</em> Some important steps following creation</h3>
19bce4d7 406
77aea16c 407<h4>Upload your key to a keyserver</h4>
7b83f7f9 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
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409that you can select from the menu when you upload, but they are all copies
410of each other, so it doesn't matter which one you use. However, it sometimes
411takes a few hours for them to match each other when a new key is uploaded.</p>
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412<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>
413<p># Upload your key to a server:
414<code>gpg --send-key [keyID]</code></p>
7b83f7f9 415
77aea16c 416<h4>Export your key to a file</h4>
4f41943f 417<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 418<p><code>
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419$ gpg --export-secret-keys -a [keyID] > my_secret_key.asc<br/>
420$ gpg --export -a [keyID] > my_public_key.asc
77aea16c 421</code></p>
7b83f7f9 422
77aea16c 423<h4>Generate a revocation certificate</h4>
63fe86d5 424<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 425
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426<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>
427<p># Generate a revocation certificate: <code>gpg --gen-revoke --output revoke.asc [keyID]</code></p>
428<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 429<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 430
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431
432<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
433<div class="troubleshooting">
434
435<h4>Troubleshooting</h4>
436
437<dl>
563fcf5d 438<dt>Sending my key to the keyserver is not working</dt>
412a3134 439<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 440
b7f7b4a2 441<dt>My key doesn't seem to be working or I get a "permission denied."</dt>
e4fa2e82 442<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 443
77aea16c 444<p># Check your permissions: <code>ls -l ~/.gnupg/*</code></p>
e4fa2e82 445<p># Set permissions to read, write, execute for only yourself, no others. These are the recommended permissions for your folder. <br/>
77aea16c 446You can use the code: <code>chmod 700 ~/.gnupg</code></p>
e4fa2e82 447<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 448You can use the code: <code>chmod 600 ~/.gnupg/*</code></p>
19bce4d7 449
e4fa2e82 450<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 451</dd>
412a3134 452
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453<dt class="feedback">Don't see a solution to your problem?</dt>
454<dd class="feedback">Please let us know on the <a
455href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
456page</a>.</dd>
457</dl>
458
459</div><!-- /.troubleshooting -->
460
461<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
462<div class="troubleshooting">
463
464<h4>Advanced</h4>
465
466<dl>
7b83f7f9 467<dt>More about keyservers</dt>
468<dd>You can find some more keyserver information<a
803e8e2e 469href="https://www.gnupg.org/gph/en/manual/x457.html"> in this manual</a>. <a
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470href="https://sks-keyservers.net/overview-of-pools.php">The sks Web site</a>
471maintains a list of highly interconnected keyservers. You can also <a
472href="https://www.gnupg.org/gph/en/manual/x56.html#AEN64">directly export
473your key</a> as a file on your computer.</dd>
7b83f7f9 474
475<dt>Transferring your keys</dt>
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476<dd>
477<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 478
77aea16c 479<p><code>
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480$ gpg --export-secret-keys -a [keyID] > my_private_key.asc<br />
481$ gpg --export -a [keyID] > my_public_key.asc<br />
482$ gpg --import my_private_key.asc<br />
e4fa2e82 483$ gpg --import my_public_key.asc
77aea16c 484</code></p>
7b83f7f9 485
35f08087 486<p>Ensure that the keyID printed is the correct one, and if so, then go ahead and add ultimate trust for it:</p>
e4fa2e82 487
77aea16c 488<p><code>
35f08087 489$ gpg --edit-key [your@email]
77aea16c 490</code></p>
7b83f7f9 491
dbfeba09 492<p>Because this is your key, you should choose <code>ultimate</code>&#65279;. You shouldn't trust anyone else's key ultimately.</p>
80b64e11 493
63fe86d5 494<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 495</dd>
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496</dl>
497
498</div><!-- /.troubleshooting -->
499</div><!-- End .main -->
500</div><!-- End #step-2b .step -->
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501</div></section><!-- End #section2 -->
502
7b83f7f9 503<!-- ~~~~~~~~~ Section 3: Set up email encryption ~~~~~~~~~ -->
504<section id="section3" class="row"><div>
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505
506<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
507<div class="section-intro">
508
7b83f7f9 509<h2><em>#3</em> Set up email encryption</h2>
64f8f564 510<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 511
512</div><!-- End .section-intro -->
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513
514<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 515<div id="step-3a" class="step">
516<div class="sidebar">
517
69e314de 518<p class="large"><img src="../static/img/en/screenshots/step3a-open-key-manager.png"
fedfd572 519alt="Step 3.A: Email Menu" /></p>
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520
521<p class="large"><img src="../static/img/en/screenshots/step3a-import-from-file.png"
7b83f7f9 522alt="Step 3.A: Import From File" /></p>
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523
524<p class="large"><img src="../static/img/en/screenshots/step3a-success.png"
7b83f7f9 525alt="Step 3.A: Success" /></p>
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526
527<p class="large"><img src="../static/img/en/screenshots/step3a-troubleshoot.png"
40833450 528alt="Step 3.A: Troubleshoot" /></p>
7b83f7f9 529</div><!-- /.sidebar -->
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530<div class="main">
531
7b83f7f9 532<h3><em>Step 3.a</em> Set up your email with encryption</h3>
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533
534<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 535
fb4dff9b 536<p># Open your email client and use "Tools" &rarr; <i>OpenPGP Key Manager</i></p>
77aea16c 537<p># Under "File" &rarr; <i>Import Secret Key(s) From File</i></p>
63fe86d5 538<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 539<p># Unlock with your passphrase</p>
540<p># You will receive a "OpenPGP keys successfully imported" window to confirm success</p>
fb4dff9b 541<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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542
543</div><!-- End .main -->
19bce4d7 544
7b83f7f9 545<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
7b83f7f9 546<div class="main">
547<div class="troubleshooting">
548<h4>Troubleshooting</h4>
549<dl>
550<dt>I'm not sure the import worked correctly</dt>
551<dd>
fb4dff9b 552Look 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 553</dd>
554
555<dt class="feedback">Don't see a solution to your problem?</dt>
556<dd class="feedback">Please let us know on the <a
557href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
558page</a>.</dd>
559</dl>
560
561</div><!-- /.troubleshooting -->
562</div><!-- End .main -->
563</div><!-- End #step3-a .step -->
564</div></section><!-- End #section3 -->
565
566<!-- ~~~~~~~~~ Section 4: Try it out ~~~~~~~~~ -->
567<section class="row" id="section4"><div>
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568
569<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
570<div class="section-intro">
571
7b83f7f9 572<h2><em>#4</em> Try it out!</h2>
69e314de 573<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 574<p>Now you'll try a test correspondence with an FSF computer program named Edward,
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575who knows how to use encryption. Except where noted, these are the same
576steps you'd follow when corresponding with a real, live person.</p>
577
578<!-- <p>NOTE: Edward is currently having some technical difficulties, so he
579may take a long time to respond, or not respond at all. We're sorry about
580this and we're working hard to fix it. Your key will still work even without
581testing with Edward.</p> -->
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582
583<div style="clear: both"></div>
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584</div><!-- End .section-intro -->
585
586<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 587<div id="step-4a" class="step">
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588<div class="sidebar">
589
69e314de 590<p class="large"><img
14c5f099 591src="../static/img/en/screenshots/step4a-send-key-to-Edward.png"
7b83f7f9 592alt="Step 4.A Send key to Edward." /></p>
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593
594</div><!-- /.sidebar -->
595<div class="main">
596
7b83f7f9 597<h3><em>Step 4.a</em> Send Edward your public key</h3>
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598
599<p>This is a special step that you won't have to do when corresponding
7b83f7f9 600with real people. In your email program's menu, go to "Tools" &rarr; "OpenPGP Key
a4eb3926 601Manager." You should see your key in the list that pops up. Right click
77aea16c 602on 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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603
604<p>Address the message to <a
605href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Put at least one word
606(whatever you want) in the subject and body of the email. Don't send yet.</p>
607
77aea16c 608<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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609
610<p class="notes">It may take two or three minutes for Edward to
611respond. In the meantime, you might want to skip ahead and check out the <a
b7f7b4a2 612href="#section6">Use it Well</a> section of this guide. Once you have received a response,
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613head to the next step. From here on, you'll be doing just the same thing as
614when corresponding with a real person.</p>
615
7b83f7f9 616<p>When you open Edward's reply, GnuPG may prompt you for your passphrase
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617before using your private key to decrypt it.</p>
618
619</div><!-- End .main -->
7b83f7f9 620</div><!-- End #step-4a .step -->
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621
622<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 623<div id="step-4b" class="step">
624<div class="sidebar">
19bce4d7 625
69e314de 626<p class="large"><img
14c5f099 627src="../static/img/en/screenshots/step4b-option1-verify-key.png"
7b83f7f9 628alt="Step 4.B Option 1. Verify key" /></p>
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629
630<p class="large"><img
14c5f099 631src="../static/img/en/screenshots/step4b-option2-import-key.png"
7b83f7f9 632alt="Step 4.B Option 2. Import key" /></p>
633</div><!-- /.sidebar -->
19bce4d7 634
7b83f7f9 635<div class="main">
19bce4d7 636
7b83f7f9 637<h3><em>Step 4.b</em> Send a test encrypted email</h3>
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638
639<h4>Get Edward's key</h4>
640
80b64e11 641<p>To encrypt an email to Edward, you need its public key, so now you'll have
7b83f7f9 642to download it from a keyserver. You can do this in two different ways:</p>
fb4dff9b 643<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 644
fb4dff9b 645<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 646
77aea16c 647<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 648
b7f7b4a2 649<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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650
651<p class="notes">Since you encrypted this email with Edward's public key,
652Edward's private key is required to decrypt it. Edward is the only one with
80b64e11 653its private key, so no one except Edward can decrypt it.</p>
19bce4d7 654
77aea16c 655<h4>Send Edward an encrypted email</h4>
7b83f7f9 656
a4eb3926 657<p> Write a new email in your email program, addressed to <a
7b83f7f9 658href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Make the subject
659"Encryption test" or something similar and write something in the body.</p>
660
77aea16c 661<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 662
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663
664<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
665<div class="troubleshooting">
666
667<h4>Troubleshooting</h4>
668
669<dl>
7b83f7f9 670<dt>"Recipients not valid, not trusted or not found"</dt>
412a3134 671<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 672
673<dt>Unable to send message</dt>
77aea16c 674<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>
7b83f7f9 675
676<dt>I can't find Edward's key</dt>
19bce4d7 677<dd>Close the pop-ups that have appeared since you clicked Send. Make sure
412a3134 678you 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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679
680<dt>Unscrambled messages in the Sent folder</dt>
681<dd>Even though you can't decrypt messages encrypted to someone else's key,
682your email program will automatically save a copy encrypted to your public key,
683which you'll be able to view from the Sent folder like a normal email. This
684is normal, and it doesn't mean that your email was not sent encrypted.</dd>
685
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686<dt class="feedback">Don't see a solution to your problem?</dt>
687<dd class="feedback">Please let us know on the <a
688href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
689page</a>.</dd>
690</dl>
691
692</div><!-- /.troubleshooting -->
693
694<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
695<div class="troubleshooting">
696
697<h4>Advanced</h4>
698
699<dl>
700<dt>Encrypt messages from the command line</dt>
701<dd>You can also encrypt and decrypt messages and files from the <a
702href="https://www.gnupg.org/gph/en/manual/x110.html">command line</a>,
703if that's your preference. The option --armor makes the encrypted output
704appear in the regular character set.</dd>
705</dl>
706
707</div><!-- /.troubleshooting -->
708</div><!-- End .main -->
7b83f7f9 709</div><!-- End #step-4b .step -->
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710
711<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
712<div id="step-headers_unencrypted" class="step">
713<div class="main">
714
715<h3><em>Important:</em> Security tips</h3>
19e80165 716
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717<p>Even if you encrypt your email, the subject line is not encrypted, so
718don't put private information there. The sending and receiving addresses
719aren't encrypted either, so a surveillance system can still figure out who
720you're communicating with. Also, surveillance agents will know that you're
721using GnuPG, even if they can't figure out what you're saying. When you
7b83f7f9 722send attachments, you can choose to encrypt them or not,
19bce4d7 723independent of the actual email.</p>
bdf319c4 724
e72398d7
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725<p>For greater security against potential attacks, you can turn off
726HTML. Instead, you can render the message body as plain text. In order
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727to do this in Icedove or Thunderbird, go to "View" &rarr; "Message Body As" &rarr; <i>Plain
728Text</i>.</p>
e72398d7 729
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730</div><!-- End .main -->
731</div><!-- End #step-headers_unencrypted .step-->
d85363e7 732
19bce4d7 733<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 734<div id="step-4c" class="step">
735<div class="sidebar">
736
69e314de 737<p class="large"><img
14c5f099 738src="../static/img/en/screenshots/step4c-Edward-response.png"
7b83f7f9 739alt="Step 4.C Edward's response" /></p>
740
741</div><!-- /.sidebar -->
742
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743<div class="main">
744
7b83f7f9 745<h3><em>Step 4.c</em> Receive a response</h3>
19bce4d7 746
80b64e11 747<p>When Edward receives your email, it will use its private key to decrypt
f54f2134 748it, then reply to you. </p>
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749
750<p class="notes">It may take two or three minutes for Edward to
751respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 752href="#section6">Use it Well</a> section of this guide.</p>
753
169c7097 754<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 755
f2545138 756<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 757
19bce4d7 758</div><!-- End .main -->
7b83f7f9 759</div><!-- End #step-4c .step -->
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760
761<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 762<div id="step-4d" class="step">
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763<div class="main">
764
80b64e11 765<h3><em>Step 4.d</em> Send a signed test email</h3>
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766
767<p>GnuPG includes a way for you to sign messages and files, verifying that
768they came from you and that they weren't tampered with along the way. These
769signatures are stronger than their pen-and-paper cousins -- they're impossible
770to forge, because they're impossible to create without your private key
771(another reason to keep your private key safe).</p>
772
773<p>You can sign messages to anyone, so it's a great way to make people
774aware that you use GnuPG and that they can communicate with you securely. If
775they don't have GnuPG, they will be able to read your message and see your
776signature. If they do have GnuPG, they'll also be able to verify that your
777signature is authentic.</p>
778
a4eb3926 779<p>To sign an email to Edward, compose any message to the email address and click the
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780pencil icon next to the lock icon so that it turns gold. If you sign a
781message, GnuPG may ask you for your password before it sends the message,
782because it needs to unlock your private key for signing.</p>
783
77aea16c 784<p>In "Account Settings" &rarr; "End-To-End-Encryption" you can opt to <i>add digital signature by default</i>.</p>
19bce4d7 785
7b83f7f9 786</div><!-- End .main -->
787</div><!-- End #step-4d .step -->
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788
789<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 790<div id="step-4e" class="step">
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791<div class="main">
792
7b83f7f9 793<h3><em>Step 4.e</em> Receive a response</h3>
19bce4d7 794
f54f2134
Z
795<p>When Edward receives your email, he will use your public key (which
796you sent him in <a href="#step-3a">Step 3.A</a>) to verify the message
80b64e11 797you sent has not been tampered with and to encrypt a reply to you.</p>
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798
799<p class="notes">It may take two or three minutes for Edward to
800respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 801href="#section6">Use it Well</a> section of this guide.</p>
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802
803<p>Edward's reply will arrive encrypted, because he prefers to use encryption
804whenever possible. If everything goes according to plan, it should say
805"Your signature was verified." If your test signed email was also encrypted,
806he will mention that first.</p>
807
7b83f7f9 808<p>When you receive Edward's email and open it, your email client will
f54f2134
Z
809automatically detect that it is encrypted with your public key, and
810then it will use your private key to decrypt it.</p>
811
19bce4d7 812</div><!-- End .main -->
7b83f7f9 813</div><!-- End #step-4e .step -->
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814</div></section>
815
803e8e2e 816<!-- ~~~~~~~~~ Section 5: Learn About the Web of Trust ~~~~~~~~~ -->
7b83f7f9 817<section class="row" id="section5"><div>
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818
819<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
820<div class="section-intro">
821
b7f7b4a2 822<h2><em>#5</em> Learn about the Web of Trust</h2>
69e314de 823<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 824
b7f7b4a2 825<p>Email encryption is a powerful technology, but it has a weakness:
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826it requires a way to verify that a person's public key is actually
827theirs. Otherwise, there would be no way to stop an attacker from making
b7f7b4a2 828an email address with your friend's name, creating keys to go with it, and
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829impersonating your friend. That's why the free software programmers that
830developed email encryption created keysigning and the Web of Trust.</p>
831
832<p>When you sign someone's key, you are publicly saying that you've verified
833that it belongs to them and not someone else.</p>
834
835<p>Signing keys and signing messages use the same type of mathematical
836operation, but they carry very different implications. It's a good practice
837to generally sign your email, but if you casually sign people's keys, you
77aea16c 838may accidentally end up vouching for the identity of an imposter.</p>
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839
840<p>People who use your public key can see who has signed it. Once you've
841used GnuPG for a long time, your key may have hundreds of signatures. You
842can consider a key to be more trustworthy if it has many signatures from
843people that you trust. The Web of Trust is a constellation of GnuPG users,
844connected to each other by chains of trust expressed through signatures.</p>
845
846</div><!-- End .section-intro -->
847
848<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 849<div id="step-5a" class="step">
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850<div class="sidebar">
851
69e314de 852<p class="large"><img
14c5f099 853src="../static/img/en/screenshots/step5a-key-properties.png"
7b83f7f9 854alt="Section 5: trusting a key" /></p>
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855
856</div><!-- /.sidebar -->
857<div class="main">
858
7b83f7f9 859<h3><em>Step 5.a</em> Sign a key</h3>
19bce4d7 860
77aea16c 861<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 862
77aea16c 863<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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864
865<p class="notes">You've just effectively said "I trust that Edward's public
866key actually belongs to Edward." This doesn't mean much because Edward isn't
b7f7b4a2 867a 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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868
869<!--<div id="pgp-pathfinder">
870
871<form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi"
872method="get">
873
f211d856 874<p><strong>From:</strong><input type="text" value="xD41A008"
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875name="FROM"></p>
876
f211d856 877<p><strong>To:</strong><input type="text" value="50BD01x4" name="TO"></p>
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878
879<p class="buttons"><input type="submit" value="trust paths" name="PATHS"><input
880type="reset" value="reset" name=".reset"></p>
881
882</form>
883
884</div>End #pgp-pathfinder -->
885</div><!-- End .main -->
7b83f7f9 886</div><!-- End #step-5a .step -->
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887
888<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
889<div id="step-identify_keys" class="step">
890<div class="main">
891
892<h3>Identifying keys: Fingerprints and IDs</h3>
893
894<p>People's public keys are usually identified by their key fingerprint,
895which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8
896(for Edward's key). You can see the fingerprint for your public key, and
7b83f7f9 897other public keys saved on your computer, by going to OpenPGP Key
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898Management in your email program's menu, then right clicking on the key
899and choosing Key Properties. It's good practice to share your fingerprint
900wherever you share your email address, so that people can double-check that
901they have the correct public key when they download yours from a keyserver.</p>
902
c0c01f86 903<p class="notes">You may also see public keys referred to by a shorter
a4eb3926 904keyID. This keyID is visible directly from the Key Management
905window. These eight character keyIDs were previously used for
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906identification, which used to be safe, but is no longer reliable. You
907need to check the full fingerprint as part of verifying you have the
908correct key for the person you are trying to contact. Spoofing, in
909which someone intentionally generates a key with a fingerprint whose
910final eight characters are the same as another, is unfortunately
911common.</p>
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912
913</div><!-- End .main -->
914</div><!-- End #step-identify_keys .step-->
915
916<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
917<div id="check-ids-before-signing" class="step">
918<div class="main">
919
920<h3><em>Important:</em> What to consider when signing keys</h3>
921
922<p>Before signing a person's key, you need to be confident that it actually
923belongs to them, and that they are who they say they are. Ideally, this
924confidence comes from having interactions and conversations with them over
925time, and witnessing interactions between them and others. Whenever signing
926a key, ask to see the full public key fingerprint, and not just the shorter
a4eb3926 927keyID. If you feel it's important to sign the key of someone you've just
19bce4d7 928met, also ask them to show you their government identification, and make
7b83f7f9 929sure the name on the ID matches the name on the public key.</p>
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930
931<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
932<div class="troubleshooting">
933
934<h4>Advanced</h4>
935
936<dl>
937<dt>Master the Web of Trust</dt>
938<dd>Unfortunately, trust does not spread between users the way <a
6003a573 939href="https://fennetic.net/irc/finney.org/~hal/web_of_trust.html">many people
a4eb3926 940think</a>. One of the best ways to strengthen the GnuPG community is to deeply <a
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941href="https://www.gnupg.org/gph/en/manual/x334.html">understand</a> the Web of
942Trust and to carefully sign as many people's keys as circumstances permit.</dd>
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943</dl>
944
945</div><!-- /.troubleshooting -->
946</div><!-- End .main -->
947</div><!-- End #check-ids-before-signing .step-->
7b83f7f9 948</div></section><!-- End #section5 -->
d85363e7 949
7b83f7f9 950<!-- ~~~~~~~~~ Section 6: Use it well ~~~~~~~~~ -->
951<section id="section6" class="row"><div>
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952
953<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
954<div class="section-intro">
955
7b83f7f9 956<h2><em>#6</em> Use it well</h2>
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957
958<p>Everyone uses GnuPG a little differently, but it's important to follow
959some basic practices to keep your email secure. Not following them, you
960risk the privacy of the people you communicate with, as well as your own,
961and damage the Web of Trust.</p>
962
963</div><!-- End .section-intro -->
964
965<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 966<div id="step-6a" class="step">
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967<div class="sidebar">
968
69e314de 969<p class="medium"><img
1805f65d 970src="../static/img/en/screenshots/section6-01-use-it-well.png"
7b83f7f9 971alt="Section 6: Use it Well (1)" /></p>
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972
973</div><!-- /.sidebar -->
974<div class="main">
975
976<h3>When should I encrypt? When should I sign?</h3>
977
978<p>The more you can encrypt your messages, the better. If you only encrypt
979emails occasionally, each encrypted message could raise a red flag for
980surveillance systems. If all or most of your email is encrypted, people
981doing surveillance won't know where to start. That's not to say that only
982encrypting some of your email isn't helpful -- it's a great start and it
983makes bulk surveillance more difficult.</p>
984
985<p>Unless you don't want to reveal your own identity (which requires other
986protective measures), there's no reason not to sign every message, whether or
987not you are encrypting. In addition to allowing those with GnuPG to verify
988that the message came from you, signing is a non-intrusive way to remind
989everyone that you use GnuPG and show support for secure communication. If you
990often send signed messages to people that aren't familiar with GnuPG, it's
991nice to also include a link to this guide in your standard email signature
992(the text kind, not the cryptographic kind).</p>
993
994</div><!-- End .main -->
7b83f7f9 995</div><!-- End #step-6a .step -->
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996
997<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 998<div id="step-6b" class="step">
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999<div class="sidebar">
1000
69e314de 1001<p class="medium"><img
1805f65d 1002src="../static/img/en/screenshots/section6-02-use-it-well.png"
7b83f7f9 1003alt="Section 6: Use it Well (2)" /></p>
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1004
1005</div><!-- /.sidebar -->
1006<div class="main">
1007
1008<h3>Be wary of invalid keys</h3>
1009
1010<p>GnuPG makes email safer, but it's still important to watch out for invalid
1011keys, which might have fallen into the wrong hands. Email encrypted with
1012invalid keys might be readable by surveillance programs.</p>
1013
1014<p>In your email program, go back to the first encrypted email that Edward
1015sent you. Because Edward encrypted it with your public key, it will have a
80b64e11 1016green checkmark a at the top "OpenPGP" button.</p>
19bce4d7 1017
77aea16c 1018<p><strong>When using GnuPG, make a habit of glancing at that button. The program
4227f3fd 1019will warn you there if you get an email signed with a key that can't
77aea16c 1020be trusted.</strong></p>
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1021
1022</div><!-- End .main -->
7b83f7f9 1023</div><!-- End #step-6b .step -->
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1024
1025<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1026<div id="step-6c" class="step">
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1027<div class="main">
1028
1029<h3>Copy your revocation certificate to somewhere safe</h3>
1030
1031<p>Remember when you created your keys and saved the revocation certificate
80b64e11 1032that 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>
19bce4d7
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1033
1034<p>If your private key ever gets lost or stolen, you'll need this certificate
1035file to let people know that you are no longer using that keypair.</p>
1036
1037</div><!-- End .main -->
7b83f7f9 1038</div><!-- End #step-6c .step -->
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1039
1040<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1041<div id="step-lost_key" class="step">
1042<div class="main">
1043
b7f7b4a2 1044<h3><em>IMPORTANT:</em> ACT SWIFTLY if someone gets your private key</h3>
19bce4d7 1045
b7f7b4a2 1046<p>If you lose your private key or someone else gets a hold
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1047of it (say, by stealing or cracking your computer), it's
1048important to revoke it immediately before someone else uses
1049it to read your encrypted email or forge your signature. This
1050guide doesn't cover how to revoke a key, but you can follow these <a
1051href="https://www.hackdiary.com/2004/01/18/revoking-a-gpg-key/">instructions</a>.
1052After you're done revoking, make a new key and send an email to everyone
1053with whom you usually use your key to make sure they know, including a copy
1054of your new key.</p>
1055
1056</div><!-- End .main -->
1057</div><!-- End #step-lost_key .step-->
1058
35f08087 1059<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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1060<div id="webmail-and-GnuPG" class="step">
1061<div class="main">
1062
1063<h3>Webmail and GnuPG</h3>
1064
1065<p>When you use a web browser to access your email, you're using webmail,
1066an email program stored on a distant website. Unlike webmail, your desktop
1067email program runs on your own computer. Although webmail can't decrypt
1068encrypted email, it will still display it in its encrypted form. If you
1069primarily use webmail, you'll know to open your email client when you receive
1070a scrambled email.</p>
1071
1072</div><!-- End .main -->
1073</div><!-- End #webmail-and-GnuPG .step-->
1074
35f08087 1075<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1076<div id="step-6d" class="step">
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1077<div class="main">
1078
1079<h3>Make your public key part of your online identity</h3>
1080
1081<p> First add your public key fingerprint to your email signature, then
1082compose an email to at least five of your friends, telling them you just
1083set up GnuPG and mentioning your public key fingerprint. Link to this guide
1084and ask them to join you. Don't forget that there's also an awesome <a
1085href="infographic.html">infographic to share.</a></p>
1086
1087<p class="notes">Start writing your public key fingerprint anywhere someone
1088would see your email address: your social media profiles, blog, Website,
1089or business card. (At the Free Software Foundation, we put ours on our
1090<a href="https://fsf.org/about/staff">staff page</a>.) We need to get our
1091culture to the point that we feel like something is missing when we see an
1092email address without a public key fingerprint.</p>
1093
35f08087 1094</div><!-- End .main-->
1095</div><!-- End #step-6d .step-->
7b83f7f9 1096</div></section><!-- End #section6 -->
19bce4d7 1097
7b83f7f9 1098<!-- ~~~~~~~~~ Section 7: Next steps ~~~~~~~~~ -->
b7f7b4a2 1099<section class="row" id="section7">
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1100<div id="step-click_here" class="step">
1101<div class="main">
0a225228 1102
19bce4d7 1103<h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
bb28ee32 1104
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1105</div><!-- End .main -->
1106</div><!-- End #step-click_here .step-->
7b83f7f9 1107</section><!-- End #section7 -->
bdf319c4 1108
19bce4d7 1109<!-- ~~~~~~~~~ FAQ ~~~~~~~~~ -->
f44dd62f 1110<!-- When un-commenting this section go to main.css and search
116f80c3 1111for /* Guide Sections Background */ then add #faq to the desired color
19bce4d7 1112<section class="row" id="faq"><div>
116f80c3 1113<div class="sidebar">
19bce4d7 1114
116f80c3 1115<h2>FAQ</h2>
6c495e2d 1116
19bce4d7 1117</div>
116f80c3 1118<div class="main">
19bce4d7 1119
116f80c3
ZR
1120<dl>
1121<dt>My key expired</dt>
1122<dd>Answer coming soon.</dd>
6c495e2d 1123
116f80c3
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1124<dt>Who can read encrypted messages? Who can read signed ones?</dt>
1125<dd>Answer coming soon.</dd>
6c495e2d 1126
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1127<dt>My email program is opening at times I don't want it to open/is now my
1128default program and I don't want it to be.</dt>
116f80c3
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1129<dd>Answer coming soon.</dd>
1130</dl>
19bce4d7 1131
116f80c3
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1132</div>
1133</div>
1134</section> --><!-- End #faq -->
bdf319c4 1135
19bce4d7
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1136<!-- ~~~~~~~~~ Footer ~~~~~~~~~ -->
1137<footer class="row" id="footer"><div>
1138<div id="copyright">
1139
1140<h4><a href="https://u.fsf.org/ys"><img
1141alt="Free Software Foundation"
14c5f099 1142src="../static/img/fsf-logo.png" /></a></h4>
19bce4d7 1143
37d0bc33 1144<p>Copyright &copy; 2014-2021 <a
19bce4d7
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1145href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a
1146href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. Please
1147support our work by <a href="https://u.fsf.org/yr">joining us as an associate
1148member.</a></p>
1149
1150<p>The images on this page are under a <a
1151href="https://creativecommons.org/licenses/by/4.0/">Creative Commons
1152Attribution 4.0 license (or later version)</a>, and the rest of it is under
1153a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons
1154Attribution-ShareAlike 4.0 license (or later version)</a>. Download the <a
6003a573 1155href="https://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">
f211d856 1156source code of Edward reply bot</a> by Andrew Engelbrecht
a3a9a0ac 1157&lt;andrew@engelbrecht.io&gt; and Josh Drake &lt;zamnedix@gnu.org&gt;,
19bce4d7 1158available under the GNU Affero General Public License. <a
6003a573 1159href="https://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these
19bce4d7
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1160licenses?</a></p>
1161
1162<p>Fonts used in the guide &amp; infographic: <a
1163href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo
6003a573 1164Impallari, <a href="https://www.google.com/fonts/specimen/Signika">Signika</a>
19bce4d7 1165by Anna Giedry&#347;, <a
6003a573 1166href="https://www.google.com/fonts/specimen/Archivo+Narrow">Archivo
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1167Narrow</a> by Omnibus-Type, <a
1168href="https://libreplanet.org/wiki/GPG_guide/Graphics_Howto#Pitfalls">PXL-2000</a>
1169by Florian Cramer.</p>
1170
1171<p>Download the <a href="emailselfdefense_source.zip">source package</a>
1172for this guide, including fonts, image source files and the text of Edward's
1173messages.</p>
1174
1175<p>This site uses the Weblabels standard for labeling <a
1176href="https://www.fsf.org/campaigns/freejs">free JavaScript</a>. View
abf30801 1177the JavaScript <a href="https://weblabels.fsf.org/emailselfdefense.fsf.org/"
19bce4d7
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1178rel="jslicense">source code and license information</a>.</p>
1179
1180</div><!-- /#copyright -->
1181
1182<p class="credits">Infographic and guide design by <a rel="external"
6003a573 1183href="https://jplusplus.org"><strong>Journalism++</strong><img
138192ae 1184src="static/img/jplusplus.png"
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1185alt="Journalism++" /></a></p><!-- /.credits -->
1186</div></footer><!-- End #footer -->
116f80c3 1187
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1196 var _paq = _paq || [];
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