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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 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to Enigmail's PGP functionality being migrated into Icedove and Thunderbird, steps 2 and 3 of the guide are currently out of date.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 -->
aa082aba 22
9980a4ad 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">
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32<li><a class="current" href="/en">English - v5.0</a></li>
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48<li><strong><a href="https://libreplanet.org/wiki/GPG_guide/Translation_Guide">
49Translate!</a></strong></li>
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50</ul>
51
52<ul id="menu" class="os">
37d0bc33 53<li class="spacer"><a href="index.html" class="current">Set up guide</a></li>
54<!--<li><a href="mac.html">Mac OS</a></li>-->
55<!--<li><a href="windows.html">Windows</a></li>-->
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56<li class="spacer"><a href="workshops.html">Teach your friends</a></li>
57<li class="spacer"><a
770452f9 58href="https://fsf.org/share?u=https://u.fsf.org/zb&amp;t=Email%20encryption%20for%20everyone%20via%20%40fsf">
f211d856 59Share&nbsp;
14c5f099 60<img src="../static/img/gnu-social.png" class="share-logo"
19bce4d7 61alt="[GNU Social]" />&nbsp;
14c5f099 62<img src="../static/img/mastodon.png" class="share-logo"
d06ce723 63alt="[Mastodon]" />&nbsp;
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19bce4d7 65alt="[Reddit]" />&nbsp;
14c5f099 66<img src="../static/img/hacker-news.png" class="share-logo"
f211d856 67alt="[Hacker News]" /></a></li>
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68</ul>
69
70<!-- ~~~~~~~~~ FSF Introduction ~~~~~~~~~ -->
71<div id="fsf-intro">
72
6003a573 73<h3><a href="https://u.fsf.org/ys"><img
19bce4d7 74alt="Free Software Foundation"
14c5f099 75src="../static/img/fsf-logo.png" />
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76</a></h3>
77
78<div class="fsf-emphasis">
79
80<p>We fight for computer users' rights, and promote the development of free (as
81in freedom) software. Resisting bulk surveillance is very important to us.</p>
82
83<p><strong>Please donate to support Email Self-Defense. We need to keep
84improving it, and making more materials, for the benefit of people around
85the world taking the first step towards protecting their privacy.</strong></p>
86
87</div>
88
89<p><a
0dacb163 90href="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 91alt="Donate"
14c5f099 92src="../static/img/en/donate.png" /></a></p>
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93
94</div><!-- End #fsf-intro -->
95
96<!-- ~~~~~~~~~ Guide Introduction ~~~~~~~~~ -->
97<div class="intro">
98
99<p><a id="infographic" href="infographic.html"><img
14c5f099 100src="../static/img/en/infographic-button.png"
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101alt="View &amp; share our infographic &rarr;" /></a>
102Bulk surveillance violates our fundamental rights and makes free speech
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103risky. This guide will teach you a basic surveillance self-defense skill: email
104encryption. Once you've finished, you'll be able to send and receive emails
105that are scrambled to make sure a surveillance agent or thief intercepting
106your email can't read them. All you need is a computer with an Internet
107connection, an email account, and about forty minutes.</p>
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108
109<p>Even if you have nothing to hide, using encryption helps protect the privacy
110of people you communicate with, and makes life difficult for bulk surveillance
111systems. If you do have something important to hide, you're in good company;
112these are the same tools that whistleblowers use to protect their identities
80b64e11 113while shining light on human rights abuses, corruption, and other crimes.</p>
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114
115<p>In addition to using encryption, standing up
116to surveillance requires fighting politically for a <a
e59c77da 117href="https://gnu.org/philosophy/surveillance-vs-democracy.html">reduction
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118in the amount of data collected on us</a>, but the essential first step is
119to protect yourself and make surveillance of your communication as difficult
120as possible. This guide helps you do that. It is designed for beginners, but
121if you already know the basics of GnuPG or are an experienced free software
122user, you'll enjoy the advanced tips and the <a href="workshops.html">guide
123to teaching your friends</a>.</p>
124
125</div><!-- End .intro -->
126</div></header><!-- End #header -->
127
128<!-- ~~~~~~~~~ Section 1: Get the pieces ~~~~~~~~~ -->
129<section class="row" id="section1"><div>
130
131<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
132<div class="section-intro">
133
134<h2><em>#1</em> Get the pieces</h2>
135
136<p class="notes">This guide relies on software which is <a
137href="https://www.gnu.org/philosophy/free-sw.html">freely licensed</a>;
138it's completely transparent and anyone can copy it or make their
139own version. This makes it safer from surveillance than proprietary
80b64e11 140software (like Windows or macOS). Learn more about free software at <a
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141href="https://u.fsf.org/ys">fsf.org</a>.</p>
142
c174e65c 143<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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144
145<p>If you already have an email program, you can skip to <a
7b83f7f9 146href="#section2">Step 2</a>.</p>
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147
148</div><!-- End .section-intro -->
149
150<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
151<div id="step-1a" class="step">
152<div class="sidebar">
153
154<p><img
14c5f099 155src="../static/img/en/screenshots/step1a-install-wizard.png"
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156alt="Step 1.A: Install Wizard" /></p>
157
158</div><!-- /.sidebar -->
159<div class="main">
160
161<h3><em>Step 1.a</em> Set up your email program with your email account</h3>
162
163<p>Open your email program and follow the wizard (step-by-step walkthrough)
37d0bc33 164that 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 165
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166
167<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
168<div class="troubleshooting">
169
170<h4>Troubleshooting</h4>
171
172<dl>
173<dt>The wizard doesn't launch</dt>
174<dd>You can launch the wizard yourself, but the menu option for doing so is
175named differently in each email program. The button to launch it will be in
176the program's main menu, under "New" or something similar, titled something
177like "Add account" or "New/Existing email account."</dd>
178
179<dt>The wizard can't find my account or isn't downloading my mail</dt>
180<dd>Before searching the Web, we recommend you start by asking other people
181who use your email system, to figure out the correct settings.</dd>
182
b7f7b4a2 183<dt>I can't find the menu</dt>
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184<dd>In many new email programs, the main menu is represented by an image of
185three stacked horizontal bars.</dd>
186
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187<dt class="feedback">Don't see a solution to your problem?</dt>
188<dd class="feedback">Please let us know on the <a
189href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
190page</a>.</dd>
191</dl>
192
193</div><!-- /.troubleshooting -->
194</div><!-- End .main -->
195</div><!-- End #step1-a .step -->
196
197<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
198<div id="step-1b" class="step">
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199<div class="main">
200
37d0bc33 201<h3><em>Step 1.b</em> Get your terminal ready and install GnuPG</h3>
19bce4d7 202
803e8e2e 203<p>If you are using a GNU/Linux machine, you should already have GnuPG installed, and you can skip to <a href="#section2">Step 2</a>.</p>
204<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 steps. For the rest of the steps in this guide, the steps are the same for all operating systems. </p>
19bce4d7 205
37d0bc33 206<!-- ~~~~~~~~~ MACOS ~~~~~~~~~ -->
207<div class="troubleshooting">
19bce4d7 208
77aea16c 209<h4>macOS</h4>
64af8734 210
37d0bc33 211<dl>
212<dt>Use a third-party package manager to install GnuPG</dt>
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213<dd>Your macOS comes with a program called "Terminal" pre-installed, which we'll use to set up your encryption with GnuPG, using the command line. However, the default macOS package manager makes it difficult to install GnuPG and other pieces of free software (like Emacs, GIMP, or Inkscape).<br/>
214To make things easier, we recommend setting up the third-party package manager "Homebrew" to install GnuPG. Copy the link on the home page of <a href="https://brew.sh/">Homebrew</a> and paste it in Terminal. Click "Enter" and wait for it to finalize.<br/>
215When it is done, install the program by entering the following code in Terminal:<br/>
dbfeba09 216<code>brew install gnupg gnupg2</code>&#65279;. After installation is done, you can follow the steps of the rest of this guide.</dd>
37d0bc33 217</dl>
218
219</div><!-- /.troubleshooting -->
220
221<!-- ~~~~~~~~~ WINDOWS ~~~~~~~~~ -->
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222<div class="troubleshooting">
223
37d0bc33 224<h4>Windows</h4>
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225
226<dl>
37d0bc33 227<dt>Get GnuPG by downloading GPG4Win</dt>
b4a6695d 228<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>
19bce4d7 229
b7f7b4a2 230<p class="notes">To follow the rest of the steps in this guide, you'll use the program called "PowerShell", which is a program you'll see elsewhere referred to as a "terminal." This allows you to operate your computer using the command line.</p>
37d0bc33 231</dd>
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232</dl>
233
234</div><!-- /.troubleshooting -->
235</div><!-- End .main -->
37d0bc33 236</div><!-- End #step1-b .step -->
237
80b64e11 238<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
239<div id="terminology" class="step">
240<div class="main">
241
a4eb3926 242<h3>GnuPG, OpenPGP, what?</h3>
80b64e11 243
244<p>In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP
245are used interchangeably. Technically, OpenPGP (Pretty Good Privacy) is the
246encryption standard, and GNU Privacy Guard (often shortened to GPG or GnuPG)
247is 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>
248
249</div><!-- End .main -->
250</div><!-- End #terminology.step-->
251
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252</div></section><!-- End #section1 -->
253
254<!-- ~~~~~~~~~ Section 2: Make your keys ~~~~~~~~~ -->
7b83f7f9 255<section id="section2" class="row"><div>
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256
257<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
258<div class="section-intro">
259
260<h2><em>#2</em> Make your keys</h2>
f8247ed8 261<p><img style="float:right; width:400px; margin:0 0 20px 20px;" 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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262
263<p>To use the GnuPG system, you'll need a public key and a private key (known
264together as a keypair). Each is a long string of randomly generated numbers
265and letters that are unique to you. Your public and private keys are linked
266together by a special mathematical function.</p>
267
268<p>Your public key isn't like a physical key, because it's stored in the open
269in an online directory called a keyserver. People download it and use it,
270along with GnuPG, to encrypt emails they send to you. You can think of the
271keyserver as a phonebook; people who want to send you encrypted email can
272look up your public key.</p>
273
274<p>Your private key is more like a physical key, because you keep it to
275yourself (on your computer). You use GnuPG and your private key together to
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276descramble encrypted emails other people send to you. <strong>You should never share your private key with anyone, under any
277circumstances.</strong></p>
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278
279<p>In addition to encryption and decryption, you can also use these keys to
280sign messages and check the authenticity of other people's signatures. We'll
281discuss this more in the next section.</p>
282
283</div><!-- End .section-intro -->
284
285<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
286<div id="step-2a" class="step">
287<div class="sidebar">
19bce4d7 288<p><img
14c5f099 289src="../static/img/en/screenshots/step2a-02-make-keypair.png"
35f08087 290alt="Step 2.A: Make your Keypair" /></p>
7b83f7f9 291<br />
292<p><img
14c5f099 293src="../static/img/en/screenshots/step2a-03-make-keypair.png"
7b83f7f9 294alt="Step 2.A: Set your passphrase" /></p>
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295
296</div><!-- /.sidebar -->
297<div class="main">
298
299<h3><em>Step 2.a</em> Make a keypair</h3>
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300
301<h4>Make your keypair</h4>
302<p>Open a terminal. You should be able to find it in your applications (some GNU/Linux systems respond to the the <kbd>ctrl + alt + t</kbd> shortcut). Use the following code to create your keypair in the terminal:</p>
19bce4d7 303
b7f7b4a2 304<p class="notes">We will use the command line in a terminal to create a keypair using the GnuPG program. A terminal should be installed on your GNU/Linux operating system, if you are using a macOS or Windows OS system, use the programs "Terminal" (macOS) or "PowerShell" (Windows) that were also used in section 1.</p>
19bce4d7 305
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306<p># <code>gpg --full-generate-key</code> to start the process.</p>
307<p># To answer what kind of key you would like to create, select the default option: <samp>1&nbsp;RSA&nbsp;and&nbsp;RSA</samp>.</p>
308<p># Enter the following keysize: <code>4096</code> for a strong key.</p>
309<p># Choose the expiration date, we suggest <code>2y</code> (2 years).</p>
e59c77da 310<p>Follow the prompts to continue setting up with your personal details.</p>
19bce4d7 311
77aea16c 312<h4>Set your passphrase</h4>
7b83f7f9 313<p>On the screen titled "Passphrase," pick a strong password! You can
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314do it manually, or you can use the Diceware method. Doing it manually
315is faster but not as secure. Using Diceware takes longer and requires
4d10d72d 316dice, but creates a password that is much harder for attackers to figure
19bce4d7 317out. To use it, read the section "Make a secure passphrase with Diceware" in <a
f211d856 318href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">
7b83f7f9 319this article</a> by Micah Lee.</p>
320
19bce4d7 321
7b83f7f9 322<p>If you'd like to pick a passphrase manually, come up with something
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323you can remember which is at least twelve characters long, and includes
324at least one lower case and upper case letter and at least one number or
325punctuation symbol. Never pick a password you've used elsewhere. Don't use
326any recognizable patterns, such as birthdays, telephone numbers, pets' names,
327song lyrics, quotes from books, and so on.</p>
328
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329<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
330<div class="troubleshooting">
331
332<h4>Troubleshooting</h4>
19bce4d7 333<dl>
e59c77da 334<dt>GnuPG is not installed</dt>
7b83f7f9 335<dd>
dbfeba09 336GPG is not installed. You can check if this is the case with the command <code>gpg --version</code>&#65279;.
803e8e2e 337If GnuPG is not installed, it would bring up the following result on most GNU/Linux operating systems, or something like it:
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338<samp>Command 'gpg' not found, but can be installed with:
339 sudo apt install gnupg</samp>. Follow that command and install the program.</dd>
7b83f7f9 340
341<dt>I took too long to create my passphrase</dt>
b7f7b4a2 342<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 343
b7f7b4a2 344<dt>How can I see my key?</dt>
7b83f7f9 345<dd>
dbfeba09 346Use 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>). If you want to see only your key, you can use <code>gpg --list-key [your@email]</code>&#65279;.
77aea16c 347You can also use <code>gpg --list-secret-key</code> to see your own private key.</dd>
19bce4d7 348
19bce4d7 349<dt>More resources</dt>
7b83f7f9 350<dd>For more information about this process, you can also refer to <a
351href="https://www.gnupg.org/gph/en/manual/c14.html#AEN25">The GNU Privacy
352Handbook</a>. Make sure you stick with "RSA and RSA" (the default),
353because it's newer and more secure than the algorithms the documentation
803e8e2e 354recommends. Also make sure your key is at least 4096 bits if you
80b64e11 355want to be secure.</dd>
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356
357<dt class="feedback">Don't see a solution to your problem?</dt>
358<dd class="feedback">Please let us know on the <a
359href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
360page</a>.</dd>
361</dl>
362
363</div><!-- /.troubleshooting -->
364
365<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
366<div class="troubleshooting">
367
368<h4>Advanced</h4>
19bce4d7 369<dl>
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370<dt>Advanced key pairs</dt>
371<dd>When GnuPG creates a new keypair, it compartmentalizes
372the encryption function from the signing function through <a
373href="https://wiki.debian.org/Subkeys">subkeys</a>. If you use
7b83f7f9 374subkeys carefully, you can keep your GnuPG identity more
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375secure and recover from a compromised key much more quickly. <a
376href="https://alexcabal.com/creating-the-perfect-gpg-keypair/">Alex Cabal</a>
6003a573 377and <a href="https://keyring.debian.org/creating-key.html">the Debian wiki</a>
19bce4d7 378provide good guides for setting up a secure subkey configuration.</dd>
64f8f564 379</dl>
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380
381</div><!-- /.troubleshooting -->
382</div><!-- End .main -->
383</div><!-- End #step-2a .step -->
384
385<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
386<div id="step-2b" class="step">
7b83f7f9 387<div class="sidebar">
388<p><img
14c5f099 389src="../static/img/en/screenshots/step2b-04-upload-and-certificate.png"
80b64e11 390alt="Step 2.B: Send to server and generate a certificate" /></p>
19bce4d7 391
7b83f7f9 392</div><!-- /.sidebar -->
393<div class="main">
19bce4d7 394
7b83f7f9 395<h3><em>Step 2.b</em> Some important steps following creation</h3>
19bce4d7 396
77aea16c 397<h4>Upload your key to a keyserver</h4>
7b83f7f9 398<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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399that you can select from the menu when you upload, but they are all copies
400of each other, so it doesn't matter which one you use. However, it sometimes
401takes a few hours for them to match each other when a new key is uploaded.</p>
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402<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>
403<p># Upload your key to a server:
404<code>gpg --send-key [keyID]</code></p>
7b83f7f9 405
77aea16c 406<h4>Export your key to a file</h4>
4f41943f 407<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>
7b83f7f9 408
77aea16c 409<p><code>
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410$ gpg --export-secret-keys -a [keyID] > my_secret_key.asc<br/>
411$ gpg --export -a [keyID] > my_public_key.asc
77aea16c 412</code></p>
7b83f7f9 413
77aea16c 414<h4>Generate a revocation certificate</h4>
b7f7b4a2 415<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>
416
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417<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>
418<p># Generate a revocation certificate: <code>gpg --gen-revoke --output revoke.asc [keyID]</code></p>
419<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>
dbfeba09 420<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 421
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422
423<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
424<div class="troubleshooting">
425
426<h4>Troubleshooting</h4>
427
428<dl>
b7f7b4a2 429<dt>My key doesn't seem to be working or I get a "permission denied."</dt>
e4fa2e82 430<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 431
77aea16c 432<p># Check your permissions: <code>ls -l ~/.gnupg/*</code></p>
e4fa2e82 433<p># Set permissions to read, write, execute for only yourself, no others. These are the recommended permissions for your folder. <br/>
77aea16c 434You can use the code: <code>chmod 700 ~/.gnupg</code></p>
e4fa2e82 435<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 436You can use the code: <code>chmod 600 ~/.gnupg/*</code></p>
19bce4d7 437
e4fa2e82 438<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 439</dd>
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440<dt class="feedback">Don't see a solution to your problem?</dt>
441<dd class="feedback">Please let us know on the <a
442href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
443page</a>.</dd>
444</dl>
445
446</div><!-- /.troubleshooting -->
447
448<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
449<div class="troubleshooting">
450
451<h4>Advanced</h4>
452
453<dl>
7b83f7f9 454<dt>More about keyservers</dt>
455<dd>You can find some more keyserver information<a
803e8e2e 456href="https://www.gnupg.org/gph/en/manual/x457.html"> in this manual</a>. <a
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457href="https://sks-keyservers.net/overview-of-pools.php">The sks Web site</a>
458maintains a list of highly interconnected keyservers. You can also <a
459href="https://www.gnupg.org/gph/en/manual/x56.html#AEN64">directly export
460your key</a> as a file on your computer.</dd>
7b83f7f9 461
462<dt>Transferring your keys</dt>
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463<dd>
464<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 465
77aea16c 466<p><code>
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467$ gpg --export-secret-keys -a [keyID] > my_private_key.asc<br/>
468$ gpg --export -a [keyID] > my_public_key.asc<br/>
64f8f564 469$ gpg --import my_private_key.asc<br/>
e4fa2e82 470$ gpg --import my_public_key.asc
77aea16c 471</code></p>
7b83f7f9 472
35f08087 473<p>Ensure that the keyID printed is the correct one, and if so, then go ahead and add ultimate trust for it:</p>
e4fa2e82 474
77aea16c 475<p><code>
35f08087 476$ gpg --edit-key [your@email]
77aea16c 477</code></p>
7b83f7f9 478
dbfeba09 479<p>Because this is your key, you should choose <code>ultimate</code>&#65279;. You shouldn't trust anyone else's key ultimately.</p>
80b64e11 480
a4eb3926 481<p class="notes"> Refer to <a href="#step-2b">troubleshoot 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 482</dd>
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483</dl>
484
485</div><!-- /.troubleshooting -->
486</div><!-- End .main -->
487</div><!-- End #step-2b .step -->
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488</div></section><!-- End #section2 -->
489
7b83f7f9 490<!-- ~~~~~~~~~ Section 3: Set up email encryption ~~~~~~~~~ -->
491<section id="section3" class="row"><div>
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492
493<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
494<div class="section-intro">
495
7b83f7f9 496<h2><em>#3</em> Set up email encryption</h2>
64f8f564 497<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 498
499</div><!-- End .section-intro -->
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500
501<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 502<div id="step-3a" class="step">
503<div class="sidebar">
504
14c5f099 505<p><img src="../static/img/en/screenshots/step3a-open-key-manager.png"
fedfd572 506alt="Step 3.A: Email Menu" /></p>
cf02c02f 507<br />
14c5f099 508<p><img src="../static/img/en/screenshots/step3a-import-from-file.png"
7b83f7f9 509alt="Step 3.A: Import From File" /></p>
cf02c02f 510<br />
14c5f099 511<p><img src="../static/img/en/screenshots/step3a-success.png"
7b83f7f9 512alt="Step 3.A: Success" /></p>
40833450 513<br />
14c5f099 514<p><img src="../static/img/en/screenshots/step3a-troubleshoot.png"
40833450 515alt="Step 3.A: Troubleshoot" /></p>
7b83f7f9 516</div><!-- /.sidebar -->
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517<div class="main">
518
7b83f7f9 519<h3><em>Step 3.a</em> Set up your email with encryption</h3>
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520
521<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 522
fb4dff9b 523<p># Open your email client and use "Tools" &rarr; <i>OpenPGP Key Manager</i></p>
77aea16c 524<p># Under "File" &rarr; <i>Import Secret Key(s) From File</i></p>
fb4dff9b 525<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 526<p># Unlock with your passphrase</p>
527<p># You will receive a "OpenPGP keys successfully imported" window to confirm success</p>
fb4dff9b 528<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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529
530</div><!-- End .main -->
19bce4d7 531
7b83f7f9 532<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
7b83f7f9 533<div class="main">
534<div class="troubleshooting">
535<h4>Troubleshooting</h4>
536<dl>
537<dt>I'm not sure the import worked correctly</dt>
538<dd>
fb4dff9b 539Look 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 540</dd>
541
542<dt class="feedback">Don't see a solution to your problem?</dt>
543<dd class="feedback">Please let us know on the <a
544href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
545page</a>.</dd>
546</dl>
547
548</div><!-- /.troubleshooting -->
549</div><!-- End .main -->
550</div><!-- End #step3-a .step -->
551</div></section><!-- End #section3 -->
552
553<!-- ~~~~~~~~~ Section 4: Try it out ~~~~~~~~~ -->
554<section class="row" id="section4"><div>
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555
556<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
557<div class="section-intro">
558
7b83f7f9 559<h2><em>#4</em> Try it out!</h2>
f8247ed8 560<p><img style="float:right; width:250px; margin:0 0 20px 20px;" 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 561<p>Now you'll try a test correspondence with an FSF computer program named Edward,
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562who knows how to use encryption. Except where noted, these are the same
563steps you'd follow when corresponding with a real, live person.</p>
564
565<!-- <p>NOTE: Edward is currently having some technical difficulties, so he
566may take a long time to respond, or not respond at all. We're sorry about
567this and we're working hard to fix it. Your key will still work even without
568testing with Edward.</p> -->
569</div><!-- End .section-intro -->
570
571<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 572<div id="step-4a" class="step">
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573<div class="sidebar">
574
575<p><img
14c5f099 576src="../static/img/en/screenshots/step4a-send-key-to-Edward.png"
7b83f7f9 577alt="Step 4.A Send key to Edward." /></p>
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578
579</div><!-- /.sidebar -->
580<div class="main">
581
7b83f7f9 582<h3><em>Step 4.a</em> Send Edward your public key</h3>
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583
584<p>This is a special step that you won't have to do when corresponding
7b83f7f9 585with real people. In your email program's menu, go to "Tools" &rarr; "OpenPGP Key
a4eb3926 586Manager." You should see your key in the list that pops up. Right click
77aea16c 587on 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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588
589<p>Address the message to <a
590href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Put at least one word
591(whatever you want) in the subject and body of the email. Don't send yet.</p>
592
77aea16c 593<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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594
595<p class="notes">It may take two or three minutes for Edward to
596respond. In the meantime, you might want to skip ahead and check out the <a
b7f7b4a2 597href="#section6">Use it Well</a> section of this guide. Once you have received a response,
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598head to the next step. From here on, you'll be doing just the same thing as
599when corresponding with a real person.</p>
600
7b83f7f9 601<p>When you open Edward's reply, GnuPG may prompt you for your passphrase
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602before using your private key to decrypt it.</p>
603
604</div><!-- End .main -->
7b83f7f9 605</div><!-- End #step-4a .step -->
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606
607<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 608<div id="step-4b" class="step">
609<div class="sidebar">
19bce4d7 610
7b83f7f9 611<p><img
14c5f099 612src="../static/img/en/screenshots/step4b-option1-verify-key.png"
7b83f7f9 613alt="Step 4.B Option 1. Verify key" /></p>
cf02c02f 614<br />
7b83f7f9 615<p><img
14c5f099 616src="../static/img/en/screenshots/step4b-option2-import-key.png"
7b83f7f9 617alt="Step 4.B Option 2. Import key" /></p>
618</div><!-- /.sidebar -->
19bce4d7 619
7b83f7f9 620<div class="main">
19bce4d7 621
7b83f7f9 622<h3><em>Step 4.b</em> Send a test encrypted email</h3>
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623
624<h4>Get Edward's key</h4>
625
80b64e11 626<p>To encrypt an email to Edward, you need its public key, so now you'll have
7b83f7f9 627to download it from a keyserver. You can do this in two different ways:</p>
fb4dff9b 628<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 629
fb4dff9b 630<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 631
77aea16c 632<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 633
b7f7b4a2 634<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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635
636<p class="notes">Since you encrypted this email with Edward's public key,
637Edward's private key is required to decrypt it. Edward is the only one with
80b64e11 638its private key, so no one except Edward can decrypt it.</p>
19bce4d7 639
77aea16c 640<h4>Send Edward an encrypted email</h4>
7b83f7f9 641
a4eb3926 642<p> Write a new email in your email program, addressed to <a
7b83f7f9 643href="mailto:edward-en@fsf.org">edward-en@fsf.org</a>. Make the subject
644"Encryption test" or something similar and write something in the body.</p>
645
77aea16c 646<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 647
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648
649<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
650<div class="troubleshooting">
651
652<h4>Troubleshooting</h4>
653
654<dl>
7b83f7f9 655<dt>"Recipients not valid, not trusted or not found"</dt>
77aea16c 656<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 OpenPGP Key Manager to make sure the recipient is listed there.</dd>
7b83f7f9 657
658<dt>Unable to send message</dt>
77aea16c 659<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 660
661<dt>I can't find Edward's key</dt>
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662<dd>Close the pop-ups that have appeared since you clicked Send. Make sure
663you are connected to the Internet and try again. If that doesn't work, repeat
664the process, choosing a different keyserver when it asks you to pick one.</dd>
665
666<dt>Unscrambled messages in the Sent folder</dt>
667<dd>Even though you can't decrypt messages encrypted to someone else's key,
668your email program will automatically save a copy encrypted to your public key,
669which you'll be able to view from the Sent folder like a normal email. This
670is normal, and it doesn't mean that your email was not sent encrypted.</dd>
671
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672<dt class="feedback">Don't see a solution to your problem?</dt>
673<dd class="feedback">Please let us know on the <a
674href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback
675page</a>.</dd>
676</dl>
677
678</div><!-- /.troubleshooting -->
679
680<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
681<div class="troubleshooting">
682
683<h4>Advanced</h4>
684
685<dl>
686<dt>Encrypt messages from the command line</dt>
687<dd>You can also encrypt and decrypt messages and files from the <a
688href="https://www.gnupg.org/gph/en/manual/x110.html">command line</a>,
689if that's your preference. The option --armor makes the encrypted output
690appear in the regular character set.</dd>
691</dl>
692
693</div><!-- /.troubleshooting -->
694</div><!-- End .main -->
7b83f7f9 695</div><!-- End #step-4b .step -->
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696
697<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
698<div id="step-headers_unencrypted" class="step">
699<div class="main">
700
701<h3><em>Important:</em> Security tips</h3>
19e80165 702
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703<p>Even if you encrypt your email, the subject line is not encrypted, so
704don't put private information there. The sending and receiving addresses
705aren't encrypted either, so a surveillance system can still figure out who
706you're communicating with. Also, surveillance agents will know that you're
707using GnuPG, even if they can't figure out what you're saying. When you
7b83f7f9 708send attachments, you can choose to encrypt them or not,
19bce4d7 709independent of the actual email.</p>
bdf319c4 710
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711<p>For greater security against potential attacks, you can turn off
712HTML. Instead, you can render the message body as plain text. In order
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713to do this in Icedove or Thunderbird, go to "View" &rarr; "Message Body As" &rarr; <i>Plain
714Text</i>.</p>
e72398d7 715
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716</div><!-- End .main -->
717</div><!-- End #step-headers_unencrypted .step-->
d85363e7 718
19bce4d7 719<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 720<div id="step-4c" class="step">
721<div class="sidebar">
722
723<p><img
14c5f099 724src="../static/img/en/screenshots/step4c-Edward-response.png"
7b83f7f9 725alt="Step 4.C Edward's response" /></p>
726
727</div><!-- /.sidebar -->
728
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729<div class="main">
730
7b83f7f9 731<h3><em>Step 4.c</em> Receive a response</h3>
19bce4d7 732
80b64e11 733<p>When Edward receives your email, it will use its private key to decrypt
f54f2134 734it, then reply to you. </p>
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735
736<p class="notes">It may take two or three minutes for Edward to
737respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 738href="#section6">Use it Well</a> section of this guide.</p>
739
169c7097 740<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 741
f2545138 742<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 743
19bce4d7 744</div><!-- End .main -->
7b83f7f9 745</div><!-- End #step-4c .step -->
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746
747<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 748<div id="step-4d" class="step">
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749<div class="main">
750
80b64e11 751<h3><em>Step 4.d</em> Send a signed test email</h3>
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752
753<p>GnuPG includes a way for you to sign messages and files, verifying that
754they came from you and that they weren't tampered with along the way. These
755signatures are stronger than their pen-and-paper cousins -- they're impossible
756to forge, because they're impossible to create without your private key
757(another reason to keep your private key safe).</p>
758
759<p>You can sign messages to anyone, so it's a great way to make people
760aware that you use GnuPG and that they can communicate with you securely. If
761they don't have GnuPG, they will be able to read your message and see your
762signature. If they do have GnuPG, they'll also be able to verify that your
763signature is authentic.</p>
764
a4eb3926 765<p>To sign an email to Edward, compose any message to the email address and click the
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766pencil icon next to the lock icon so that it turns gold. If you sign a
767message, GnuPG may ask you for your password before it sends the message,
768because it needs to unlock your private key for signing.</p>
769
77aea16c 770<p>In "Account Settings" &rarr; "End-To-End-Encryption" you can opt to <i>add digital signature by default</i>.</p>
19bce4d7 771
7b83f7f9 772</div><!-- End .main -->
773</div><!-- End #step-4d .step -->
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774
775<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 776<div id="step-4e" class="step">
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777<div class="main">
778
7b83f7f9 779<h3><em>Step 4.e</em> Receive a response</h3>
19bce4d7 780
f54f2134
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781<p>When Edward receives your email, he will use your public key (which
782you sent him in <a href="#step-3a">Step 3.A</a>) to verify the message
80b64e11 783you sent has not been tampered with and to encrypt a reply to you.</p>
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784
785<p class="notes">It may take two or three minutes for Edward to
786respond. In the meantime, you might want to skip ahead and check out the <a
7b83f7f9 787href="#section6">Use it Well</a> section of this guide.</p>
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788
789<p>Edward's reply will arrive encrypted, because he prefers to use encryption
790whenever possible. If everything goes according to plan, it should say
791"Your signature was verified." If your test signed email was also encrypted,
792he will mention that first.</p>
793
7b83f7f9 794<p>When you receive Edward's email and open it, your email client will
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795automatically detect that it is encrypted with your public key, and
796then it will use your private key to decrypt it.</p>
797
19bce4d7 798</div><!-- End .main -->
7b83f7f9 799</div><!-- End #step-4e .step -->
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800</div></section>
801
803e8e2e 802<!-- ~~~~~~~~~ Section 5: Learn About the Web of Trust ~~~~~~~~~ -->
7b83f7f9 803<section class="row" id="section5"><div>
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804
805<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
806<div class="section-intro">
807
b7f7b4a2 808<h2><em>#5</em> Learn about the Web of Trust</h2>
f8247ed8 809<p><img style="float:right; width:250px; margin:0 0 20px 20px;" src="../static/img/en/screenshots/section5-web-of-trust.png" alt="Illustration of keys all interconnected with a web of lines"/></p>
19bce4d7 810
b7f7b4a2 811<p>Email encryption is a powerful technology, but it has a weakness:
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812it requires a way to verify that a person's public key is actually
813theirs. Otherwise, there would be no way to stop an attacker from making
b7f7b4a2 814an email address with your friend's name, creating keys to go with it, and
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815impersonating your friend. That's why the free software programmers that
816developed email encryption created keysigning and the Web of Trust.</p>
817
818<p>When you sign someone's key, you are publicly saying that you've verified
819that it belongs to them and not someone else.</p>
820
821<p>Signing keys and signing messages use the same type of mathematical
822operation, but they carry very different implications. It's a good practice
823to generally sign your email, but if you casually sign people's keys, you
77aea16c 824may accidentally end up vouching for the identity of an imposter.</p>
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825
826<p>People who use your public key can see who has signed it. Once you've
827used GnuPG for a long time, your key may have hundreds of signatures. You
828can consider a key to be more trustworthy if it has many signatures from
829people that you trust. The Web of Trust is a constellation of GnuPG users,
830connected to each other by chains of trust expressed through signatures.</p>
831
832</div><!-- End .section-intro -->
833
834<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 835<div id="step-5a" class="step">
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836<div class="sidebar">
837
838<p><img
14c5f099 839src="../static/img/en/screenshots/step5a-key-properties.png"
7b83f7f9 840alt="Section 5: trusting a key" /></p>
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841
842</div><!-- /.sidebar -->
843<div class="main">
844
7b83f7f9 845<h3><em>Step 5.a</em> Sign a key</h3>
19bce4d7 846
77aea16c 847<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 848
77aea16c 849<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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850
851<p class="notes">You've just effectively said "I trust that Edward's public
852key actually belongs to Edward." This doesn't mean much because Edward isn't
b7f7b4a2 853a 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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854
855<!--<div id="pgp-pathfinder">
856
857<form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi"
858method="get">
859
f211d856 860<p><strong>From:</strong><input type="text" value="xD41A008"
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861name="FROM"></p>
862
f211d856 863<p><strong>To:</strong><input type="text" value="50BD01x4" name="TO"></p>
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864
865<p class="buttons"><input type="submit" value="trust paths" name="PATHS"><input
866type="reset" value="reset" name=".reset"></p>
867
868</form>
869
870</div>End #pgp-pathfinder -->
871</div><!-- End .main -->
7b83f7f9 872</div><!-- End #step-5a .step -->
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873
874<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
875<div id="step-identify_keys" class="step">
876<div class="main">
877
878<h3>Identifying keys: Fingerprints and IDs</h3>
879
880<p>People's public keys are usually identified by their key fingerprint,
881which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8
882(for Edward's key). You can see the fingerprint for your public key, and
7b83f7f9 883other public keys saved on your computer, by going to OpenPGP Key
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884Management in your email program's menu, then right clicking on the key
885and choosing Key Properties. It's good practice to share your fingerprint
886wherever you share your email address, so that people can double-check that
887they have the correct public key when they download yours from a keyserver.</p>
888
c0c01f86 889<p class="notes">You may also see public keys referred to by a shorter
a4eb3926 890keyID. This keyID is visible directly from the Key Management
891window. These eight character keyIDs were previously used for
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892identification, which used to be safe, but is no longer reliable. You
893need to check the full fingerprint as part of verifying you have the
894correct key for the person you are trying to contact. Spoofing, in
895which someone intentionally generates a key with a fingerprint whose
896final eight characters are the same as another, is unfortunately
897common.</p>
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898
899</div><!-- End .main -->
900</div><!-- End #step-identify_keys .step-->
901
902<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
903<div id="check-ids-before-signing" class="step">
904<div class="main">
905
906<h3><em>Important:</em> What to consider when signing keys</h3>
907
908<p>Before signing a person's key, you need to be confident that it actually
909belongs to them, and that they are who they say they are. Ideally, this
910confidence comes from having interactions and conversations with them over
911time, and witnessing interactions between them and others. Whenever signing
912a key, ask to see the full public key fingerprint, and not just the shorter
a4eb3926 913keyID. If you feel it's important to sign the key of someone you've just
19bce4d7 914met, also ask them to show you their government identification, and make
7b83f7f9 915sure the name on the ID matches the name on the public key.</p>
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916
917<!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
918<div class="troubleshooting">
919
920<h4>Advanced</h4>
921
922<dl>
923<dt>Master the Web of Trust</dt>
924<dd>Unfortunately, trust does not spread between users the way <a
6003a573 925href="https://fennetic.net/irc/finney.org/~hal/web_of_trust.html">many people
a4eb3926 926think</a>. One of the best ways to strengthen the GnuPG community is to deeply <a
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927href="https://www.gnupg.org/gph/en/manual/x334.html">understand</a> the Web of
928Trust and to carefully sign as many people's keys as circumstances permit.</dd>
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929</dl>
930
931</div><!-- /.troubleshooting -->
932</div><!-- End .main -->
933</div><!-- End #check-ids-before-signing .step-->
7b83f7f9 934</div></section><!-- End #section5 -->
d85363e7 935
7b83f7f9 936<!-- ~~~~~~~~~ Section 6: Use it well ~~~~~~~~~ -->
937<section id="section6" class="row"><div>
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938
939<!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
940<div class="section-intro">
941
7b83f7f9 942<h2><em>#6</em> Use it well</h2>
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943
944<p>Everyone uses GnuPG a little differently, but it's important to follow
945some basic practices to keep your email secure. Not following them, you
946risk the privacy of the people you communicate with, as well as your own,
947and damage the Web of Trust.</p>
948
949</div><!-- End .section-intro -->
950
951<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 952<div id="step-6a" class="step">
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953<div class="sidebar">
954
955<p><img
1805f65d 956src="../static/img/en/screenshots/section6-01-use-it-well.png"
7b83f7f9 957alt="Section 6: Use it Well (1)" /></p>
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958
959</div><!-- /.sidebar -->
960<div class="main">
961
962<h3>When should I encrypt? When should I sign?</h3>
963
964<p>The more you can encrypt your messages, the better. If you only encrypt
965emails occasionally, each encrypted message could raise a red flag for
966surveillance systems. If all or most of your email is encrypted, people
967doing surveillance won't know where to start. That's not to say that only
968encrypting some of your email isn't helpful -- it's a great start and it
969makes bulk surveillance more difficult.</p>
970
971<p>Unless you don't want to reveal your own identity (which requires other
972protective measures), there's no reason not to sign every message, whether or
973not you are encrypting. In addition to allowing those with GnuPG to verify
974that the message came from you, signing is a non-intrusive way to remind
975everyone that you use GnuPG and show support for secure communication. If you
976often send signed messages to people that aren't familiar with GnuPG, it's
977nice to also include a link to this guide in your standard email signature
978(the text kind, not the cryptographic kind).</p>
979
980</div><!-- End .main -->
7b83f7f9 981</div><!-- End #step-6a .step -->
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982
983<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 984<div id="step-6b" class="step">
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985<div class="sidebar">
986
987<p><img
1805f65d 988src="../static/img/en/screenshots/section6-02-use-it-well.png"
7b83f7f9 989alt="Section 6: Use it Well (2)" /></p>
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990
991</div><!-- /.sidebar -->
992<div class="main">
993
994<h3>Be wary of invalid keys</h3>
995
996<p>GnuPG makes email safer, but it's still important to watch out for invalid
997keys, which might have fallen into the wrong hands. Email encrypted with
998invalid keys might be readable by surveillance programs.</p>
999
1000<p>In your email program, go back to the first encrypted email that Edward
1001sent you. Because Edward encrypted it with your public key, it will have a
80b64e11 1002green checkmark a at the top "OpenPGP" button.</p>
19bce4d7 1003
77aea16c 1004<p><strong>When using GnuPG, make a habit of glancing at that button. The program
4227f3fd 1005will warn you there if you get an email signed with a key that can't
77aea16c 1006be trusted.</strong></p>
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1007
1008</div><!-- End .main -->
7b83f7f9 1009</div><!-- End #step-6b .step -->
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1010
1011<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1012<div id="step-6c" class="step">
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1013<div class="main">
1014
1015<h3>Copy your revocation certificate to somewhere safe</h3>
1016
1017<p>Remember when you created your keys and saved the revocation certificate
80b64e11 1018that 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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1019
1020<p>If your private key ever gets lost or stolen, you'll need this certificate
1021file to let people know that you are no longer using that keypair.</p>
1022
1023</div><!-- End .main -->
7b83f7f9 1024</div><!-- End #step-6c .step -->
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1025
1026<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
1027<div id="step-lost_key" class="step">
1028<div class="main">
1029
b7f7b4a2 1030<h3><em>IMPORTANT:</em> ACT SWIFTLY if someone gets your private key</h3>
19bce4d7 1031
b7f7b4a2 1032<p>If you lose your private key or someone else gets a hold
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1033of it (say, by stealing or cracking your computer), it's
1034important to revoke it immediately before someone else uses
1035it to read your encrypted email or forge your signature. This
1036guide doesn't cover how to revoke a key, but you can follow these <a
1037href="https://www.hackdiary.com/2004/01/18/revoking-a-gpg-key/">instructions</a>.
1038After you're done revoking, make a new key and send an email to everyone
1039with whom you usually use your key to make sure they know, including a copy
1040of your new key.</p>
1041
1042</div><!-- End .main -->
1043</div><!-- End #step-lost_key .step-->
1044
35f08087 1045<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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1046<div id="webmail-and-GnuPG" class="step">
1047<div class="main">
1048
1049<h3>Webmail and GnuPG</h3>
1050
1051<p>When you use a web browser to access your email, you're using webmail,
1052an email program stored on a distant website. Unlike webmail, your desktop
1053email program runs on your own computer. Although webmail can't decrypt
1054encrypted email, it will still display it in its encrypted form. If you
1055primarily use webmail, you'll know to open your email client when you receive
1056a scrambled email.</p>
1057
1058</div><!-- End .main -->
1059</div><!-- End #webmail-and-GnuPG .step-->
1060
35f08087 1061<!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
7b83f7f9 1062<div id="step-6d" class="step">
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1063<div class="main">
1064
1065<h3>Make your public key part of your online identity</h3>
1066
1067<p> First add your public key fingerprint to your email signature, then
1068compose an email to at least five of your friends, telling them you just
1069set up GnuPG and mentioning your public key fingerprint. Link to this guide
1070and ask them to join you. Don't forget that there's also an awesome <a
1071href="infographic.html">infographic to share.</a></p>
1072
1073<p class="notes">Start writing your public key fingerprint anywhere someone
1074would see your email address: your social media profiles, blog, Website,
1075or business card. (At the Free Software Foundation, we put ours on our
1076<a href="https://fsf.org/about/staff">staff page</a>.) We need to get our
1077culture to the point that we feel like something is missing when we see an
1078email address without a public key fingerprint.</p>
1079
35f08087 1080</div><!-- End .main-->
1081</div><!-- End #step-6d .step-->
7b83f7f9 1082</div></section><!-- End #section6 -->
19bce4d7 1083
7b83f7f9 1084<!-- ~~~~~~~~~ Section 7: Next steps ~~~~~~~~~ -->
b7f7b4a2 1085<section class="row" id="section7">
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1086<div id="step-click_here" class="step">
1087<div class="main">
0a225228 1088
19bce4d7 1089<h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
bb28ee32 1090
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1091</div><!-- End .main -->
1092</div><!-- End #step-click_here .step-->
7b83f7f9 1093</section><!-- End #section7 -->
bdf319c4 1094
19bce4d7 1095<!-- ~~~~~~~~~ FAQ ~~~~~~~~~ -->
f44dd62f 1096<!-- When un-commenting this section go to main.css and search
116f80c3 1097for /* Guide Sections Background */ then add #faq to the desired color
19bce4d7 1098<section class="row" id="faq"><div>
116f80c3 1099<div class="sidebar">
19bce4d7 1100
116f80c3 1101<h2>FAQ</h2>
6c495e2d 1102
19bce4d7 1103</div>
116f80c3 1104<div class="main">
19bce4d7 1105
116f80c3
ZR
1106<dl>
1107<dt>My key expired</dt>
1108<dd>Answer coming soon.</dd>
6c495e2d 1109
116f80c3
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1110<dt>Who can read encrypted messages? Who can read signed ones?</dt>
1111<dd>Answer coming soon.</dd>
6c495e2d 1112
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1113<dt>My email program is opening at times I don't want it to open/is now my
1114default program and I don't want it to be.</dt>
116f80c3
ZR
1115<dd>Answer coming soon.</dd>
1116</dl>
19bce4d7 1117
116f80c3
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1118</div>
1119</div>
1120</section> --><!-- End #faq -->
bdf319c4 1121
19bce4d7
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1122<!-- ~~~~~~~~~ Footer ~~~~~~~~~ -->
1123<footer class="row" id="footer"><div>
1124<div id="copyright">
1125
1126<h4><a href="https://u.fsf.org/ys"><img
1127alt="Free Software Foundation"
14c5f099 1128src="../static/img/fsf-logo.png" /></a></h4>
19bce4d7 1129
37d0bc33 1130<p>Copyright &copy; 2014-2021 <a
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1131href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a
1132href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. Please
1133support our work by <a href="https://u.fsf.org/yr">joining us as an associate
1134member.</a></p>
1135
1136<p>The images on this page are under a <a
1137href="https://creativecommons.org/licenses/by/4.0/">Creative Commons
1138Attribution 4.0 license (or later version)</a>, and the rest of it is under
1139a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons
1140Attribution-ShareAlike 4.0 license (or later version)</a>. Download the <a
6003a573 1141href="https://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">
f211d856 1142source code of Edward reply bot</a> by Andrew Engelbrecht
a3a9a0ac 1143&lt;andrew@engelbrecht.io&gt; and Josh Drake &lt;zamnedix@gnu.org&gt;,
19bce4d7 1144available under the GNU Affero General Public License. <a
6003a573 1145href="https://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these
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1146licenses?</a></p>
1147
1148<p>Fonts used in the guide &amp; infographic: <a
1149href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo
6003a573 1150Impallari, <a href="https://www.google.com/fonts/specimen/Signika">Signika</a>
19bce4d7 1151by Anna Giedry&#347;, <a
6003a573 1152href="https://www.google.com/fonts/specimen/Archivo+Narrow">Archivo
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1153Narrow</a> by Omnibus-Type, <a
1154href="https://libreplanet.org/wiki/GPG_guide/Graphics_Howto#Pitfalls">PXL-2000</a>
1155by Florian Cramer.</p>
1156
1157<p>Download the <a href="emailselfdefense_source.zip">source package</a>
1158for this guide, including fonts, image source files and the text of Edward's
1159messages.</p>
1160
1161<p>This site uses the Weblabels standard for labeling <a
1162href="https://www.fsf.org/campaigns/freejs">free JavaScript</a>. View
abf30801 1163the JavaScript <a href="https://weblabels.fsf.org/emailselfdefense.fsf.org/"
19bce4d7
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1164rel="jslicense">source code and license information</a>.</p>
1165
1166</div><!-- /#copyright -->
1167
1168<p class="credits">Infographic and guide design by <a rel="external"
6003a573 1169href="https://jplusplus.org"><strong>Journalism++</strong><img
138192ae 1170src="static/img/jplusplus.png"
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1171alt="Journalism++" /></a></p><!-- /.credits -->
1172</div></footer><!-- End #footer -->
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