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1<!DOCTYPE html>
2<html>
3 <head>
c1ea5176 4 <meta charset="utf-8" />
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614e3bf4 6 <title>Email Self-Defense - a guide to fighting surveillance with GnuPG encryption</title>
e4a684cf 7 <meta name="keywords" content="GnuPG, GPG, openpgp, surveillance, privacy, email, Enigmail" />
c1ea5176 8 <meta name="description" content="Email surveillance violates our fundamental rights and makes free speech risky. This guide will teach you email self-defense in 30 minutes with GnuPG." />
2cb815ae 9
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10 <meta name="viewport" content="width=device-width, initial-scale=1" />
11 <link rel="stylesheet" href="//static.fsf.org/nosvn/enc-dev0/css/main.css" />
f65fbc20 12 <link rel="shortcut icon" href="//static.fsf.org/nosvn/enc-dev0/img/favicon.ico" />
05bfcb9e 13
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14 </head>
15 <body>
6c495e2d 16
2cb815ae 17<!-- ~~~~~~~~~ GnuPG Header and introduction text ~~~~~~~~~ -->
9176cae7 18
b9b57d1a 19 <header class="row" id="header">
bdf319c4 20 <div>
b3ec2c8d 21 <h1>Email Self-Defense</h1>
5a426655 22
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23 <!-- Language list for browsers that do not have JS enabled -->
24 <ul id="languages" class="os">
25 <li><a class="current" href="/en">english</a></li>
8fd4a69a 26 <!--<li><a href="/es">español</a></li>-->
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27 <li><a href="/fr">français</a></li>
28 <li><a href="/de">deutsch</a></li>
989d24e8 29 <!--<li><a href="/it">italiano</a></li>-->
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30 <li><a href="/pt-br">português do Brasil</a></li>
31 <li><a href="/tr">türkçe</a></li>
89647b8f 32 <!--<li><a href="/ro">română</a></li>-->
b3ec2c8d 33 <li><a href="/ru">русский</a></li>
8fd4a69a 34 <!--<li><a href="/ml">മലയാളം</a></li>-->
d27e43aa 35 <!--<li><a href="/ko">한국어</a></li>-->
b3ec2c8d 36 <li><a href="/ja">日本語</a></li>
3085b76a 37 <!--<li><a href="/el">ελληνικά</a></li>-->
8f538927 38 <!--<li><a href="/ar">العربية</a></li>-->
b3ec2c8d 39 </ul>
5a426655 40
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41 <ul id="menu" class="os">
42 <li class="spacer">
43 <a href="index.html" class="current">GNU/Linux</a>
44 </li>
45 <li>
46 <a href="mac.html">Mac OS</a>
47 </li>
48 <li>
49 <a href="windows.html">Windows</a>
50 </li>
80ef766e 51
b3ec2c8d 52 <li class="spacer">
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53 <a href="https://fsf.org/share?u=https://u.fsf.org/zb&amp;t=Email encryption for everyone via %40fsf">
54 Share&nbsp;
db57ca22 55 <img src="//static.fsf.org/nosvn/enc-dev0/img/gnu-social.png"
44a50574 56 class="share-logo" alt="[GNU Social]">&nbsp;
3e6a8fb6 57 <img src="//static.fsf.org/nosvn/enc-dev0/img/pump.io.png"
44a50574 58 class="share-logo" alt="[Pump.io]">&nbsp;
3e6a8fb6 59 <img src="//static.fsf.org/nosvn/enc-dev0/img/reddit-alien.png"
44a50574 60 class="share-logo" alt="[Reddit]">&nbsp;
3e6a8fb6 61 <img src="//static.fsf.org/nosvn/enc-dev0/img/hacker-news.png"
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62 class="share-logo" alt="[Hacker News]">
63 </a>
ae5aaaee 64 </li>
b3ec2c8d 65 </ul>
6b62e8bb 66
2378bdbf 67 <!-- ~~~~~~~~~ FSF Introduction ~~~~~~~~~ -->
c919b2d2 68 <div id="fsf-intro">
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69 <h3>
70 <a href="http://u.fsf.org/ys">
71 <img alt="Free Software Foundation"
c1ea5176 72 src="//static.fsf.org/nosvn/enc-dev0/img/fsf-logo.png" />
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73 </a>
74 </h3>
75 <div class="fsf-emphasis">
76 <p>
b3d5c595 77 We fight for computer users' rights, and promote the development of free (as in freedom) software. Resisting bulk surveillance is very important to us.
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78 </p>
79 <p>
80 <strong>
d8ced2c3 81 We want to translate this guide into more languages, and make a version for encryption on mobile devices. Please donate, and help people around the world take the first step towards protecting their privacy with free software.
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82 </strong>
83 </p>
84 </div>
36e7b21f 85
45cff628 86 <p><a href="https://crm.fsf.org/civicrm/contribute/transact?reset=1&amp;id=14&amp;pk_campaign=email_self_defense&amp;pk_kwd=guide_donate"><img alt="Donate" src="//static.fsf.org/nosvn/enc-dev0/img/en/donate.png" /></a> </p>
06d022ce 87
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88 </div><!-- End #fsf-intro -->
89
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90 <!-- ~~~~~~~~~ Guide Introduction ~~~~~~~~~ -->
91 <div class="intro">
bf4eb540 92 <p>
de0ab142 93 <a id="infographic" href="infographic.html"><img src="//static.fsf.org/nosvn/enc-dev0/img/en/infographic-button.png" alt="View &amp; share our infographic &rarr;" /></a>
66a99343 94 Bulk surveillance violates our fundamental rights and makes free speech risky. This guide will teach you a basic surveillance self-defense skill: email encryption. Once you've finished, you'll be able to send and receive emails that are coded to make sure a surveillance agent or thief intercepting your email can't read it. All you need is a computer with an Internet connection, an email account, and about half an hour.</p>
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95
96<p>Even if you have nothing to hide, using encryption helps protect the privacy of people you communicate with, and makes life difficult for bulk surveillance systems. If you do have something important to hide, you're in good company; these are the same tools that Edward Snowden used to share his famous secrets about the NSA.</p>
97
8015decf 98<p>In addition to using encryption, standing up to surveillance requires fighting politically for a <a href="http://gnu.org/philosophy/surveillance-vs-democracy.html">reduction in the amount of data collected on us</a>, but the essential first step is to protect yourself and make surveillance of your communication as difficult as possible. Let's get started!</p>
f56da436 99
946f0ee1 100 </div><!-- End .intro -->
0a225228 101
bdf319c4 102 </div>
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103 </header><!-- End #header -->
104
2cb815ae 105<!-- ~~~~~~~~~ Section 1: Get the pieces ~~~~~~~~~ -->
6c495e2d 106 <section class="row" id="section1">
bdf319c4 107 <div>
5c207a4d 108 <!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
2378bdbf 109 <div class="section-intro">
2378bdbf 110 <h2><em>#1</em> Get the pieces</h2>
1b319a0f 111<p class="notes">This guide relies on software which is freely licensed; it's completely transparent and anyone can copy it or make their own version. This makes it safer from surveillance than proprietary software (like Windows). Learn more about free software at <a href="https://u.fsf.org/ys">fsf.org</a>.</p>
8015decf 112
66a99343 113<p>Most GNU/Linux operating systems come with GnuPG installed on them, so you don't have to download it. Before configuring GnuPG though, you'll need a desktop email program installed on your computer. Most GNU/Linux distributions have a free software version of the Thunderbird email program available to install. This guide will work with them, in addition to Thunderbird itself. Email programs are another way to access the same email accounts you can access in a browser (like Gmail), but provide extra features.</p>
45be35ad 114 <p>If you already have one of these, you can skip to <a href="#step-1b">Step 1.b</a>.</p>
2378bdbf 115 </div><!-- End .section-intro -->
dbd3bf12 116
2cb815ae 117 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
2378bdbf 118 <div id="step-1a" class="step">
2cb815ae 119 <div class="sidebar">
de0ab142 120 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1a-install-wizard.png" alt="Step 1.A: Install Wizard" /></p>
2cb815ae 121 </div><!-- /.sidebar -->
2378bdbf 122 <div class="main">
66a99343 123 <h3><em>Step 1.a</em> Setup your email program with your email account (if it isn't already)</h3>
2cb815ae 124 <p>Open your email program and follow the wizard that sets it up with your email account.</p>
0a225228 125
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126 <!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
127 <div class="troubleshooting">
128 <h4>Troubleshooting</h4>
129 <dl>
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130 <dt>What's a wizard?</dt>
131 <dd>A wizard is a series of windows that pop up to make it easy to get something done on a computer, like installing a program. You click through it, selecting options as you go.</dd>
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132 <dt>My email program can't find my account or isn't downloading my mail</dt>
133 <dd>Before searching the Web, we recommend you start by asking other people who use your email system, to figure out the correct settings.</dd>
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134 <dt class="feedback">Don't see a solution to your problem?</dt>
135 <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
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136 </dl>
137 </div><!-- /.troubleshooting -->
138
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139 </div><!-- End .main -->
140 </div><!-- End #step1-a .step -->
6c495e2d 141
2378bdbf 142 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
f44dd62f 143 <div id="step-1b" class="step">
b7e5df33 144 <div class="sidebar">
f44dd62f 145 <ul class="images">
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146 <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-01-tools-addons.png" alt="Step 1.B: Tools -> Add-ons" /></li>
147 <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-02-search.png" alt="Step 1.B: Search Add-ons" /></li>
148 <li><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step1b-03-install.png" alt="Step 1.B: Install Add-ons" /></li>
f44dd62f 149 </ul>
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150 </div><!-- /.sidebar -->
151 <div class="main">
152 <h3><em>Step 1.b</em> Install the Enigmail plugin for your email program</h3>
153 <p>In your email program's menu, select Add-ons (it may be in the Tools section). Make sure Extensions is selected on the left. Do you see Enigmail? if so, skip this step.</p>
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154 <p>If not, search "Enigmail" with the search bar in the upper right. You can take it from here. Restart your email program when you're done.</p>
155 <!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
156 <div class="troubleshooting">
157 <h4>Troubleshooting</h4>
158 <dl>
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159 <dt>I can't find the menu.</dt>
160 <dd>In many new email programs, the main menu is represented by an image of three stacked horizontal bars.</dd>
61bbfa91 161
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162 <dt class="feedback">Don't see a solution to your problem?</dt>
163 <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
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164 </dl>
165 </div><!-- /.troubleshooting -->
166 </div><!-- End .main -->
f44dd62f 167 </div><!-- End #step-1b .step -->
bdf319c4 168 </div>
6c495e2d 169 </section><!-- End #section1 -->
bdf319c4 170
2cb815ae 171<!-- ~~~~~~~~~ Section 2: Make your keys ~~~~~~~~~ -->
6c495e2d 172 <section class="row" id="section2">
bdf319c4 173 <div>
5c207a4d 174 <!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
2378bdbf 175 <div class="section-intro">
bdf319c4 176 <h2><em>#2</em> Make your keys</h2>
bbfaa44d 177 <p>To use the GnuPG system, you'll need a public key and a private key (known together as a keypair). Each is a long string of randomly generated numbers and letters that are unique to you. Your public and private keys are linked together by a special mathematical function.</p>
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178
179<p>Your public key isn't like a physical key, because it's stored in the open in an online directory called a keyserver. People download it and use it, along with GnuPG, to encrypt emails they send to you. You can think of the keyserver as phonebook, where people who want to send you an encrypted email look up your public key.</p>
180
181<p>Your private key is more like a physical key, because you keep it to yourself (on your computer). You use GnuPG and your private key to decode encrypted emails other people send to you.</p>
2378bdbf 182 </div><!-- End .section-intro -->
6c495e2d 183
2cb815ae 184 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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185 <div id="step-2a" class="step">
186 <div class="sidebar">
de0ab142 187 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/step2a-01-make-keypair.png" alt="Step 2.A: Make a Keypair" /></p>
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188 </div><!-- /.sidebar -->
189 <div class="main">
190 <h3><em>Step 2.a</em> Make a keypair</h3>
1a7754f4 191 <p>In your email program's menu, select OpenPGP &rarr; Setup Wizard. You don't need to read the text in the window that pops up unless you'd like to, but it's good to read the text on the later screens of the wizard.</p>
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192 <p>On the second screen, titled "Signing," select "No, I want to create per-recipient rules for emails that need to be signed."</p>
193 <p>Use the default options until you reach the screen titled "Create Key".</p>
f56da436 194 <p>On the screen titled "Create Key," pick a strong password! Your password should be at least 12 characters and include at least one lower case and upper case letter and at least one number or punctuation symbol. Don't forget the password, or all this work will be wasted!</p>
034f3546 195 <p class="notes">The program will take a little while to finish the next step, the "Key Creation" screen. While you wait, do something else with your computer, like watching a movie or browsing the Web. The more you use the computer at this point, the faster the key creation will go.</p>
d325c924 196 <p>When the OpenPGP Confirm screen pops up, select Generate Certificate and choose to save it in a safe place on your computer (we recommend making a folder called "Revocation Certificate" in your home folder and keeping it there). You'll learn more about the revocation certificate in <a href="#section5">Section 5</a>. The setup wizard will ask you to move it onto an external device, but that isn't necessary at this moment.</p>
6c495e2d 197
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198 <!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
199 <div class="troubleshooting">
200 <h4>Troubleshooting</h4>
201 <dl>
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202 <dt>I can't find the OpenPGP menu.</dt>
203 <dd>In many new email programs, the main menu is represented by an image of three stacked horizontal bars. OpenPGP may be inside a section called Tools.</dd>
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204 <dt>The wizard says that it cannot find GnuPG.</dt>
205
089cc280 206 <dd>Open whatever program you usually use for installing software, and search for GnuPG, then install it. Then restart the Enigmail setup wizard by going to OpenPGP &rarr; Setup Wizard.</dd>
0a225228 207
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208 <dt class="feedback">Don't see a solution to your problem?</dt>
209 <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
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210 </dl>
211 </div><!-- /.troubleshooting -->
212 </div><!-- End .main -->
213 </div><!-- End #step-2a .step -->
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214
215 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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216 <div id="step-2b" class="step">
217 <div class="main">
218 <h3><em>Step 2.b</em> Upload your public key to a keyserver</h3>
219 <p>In your email program's menu, select OpenPGP &rarr; Key Management.</p>
220<p>Right click on your key and select Upload Public Keys to Keyserver. Use the default keyserver in the popup.</p>
7a3d8912 221<p class="notes">Now someone who wants to send you an encrypted message can download your public key from the Internet. There are multiple keyservers that you can select from the menu when you upload, but they are all copies of each other, so it doesn't matter which one you use. However, it sometimes takes a few hours for them to match each other when a new key is uploaded.</p>
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222 <!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
223 <div class="troubleshooting">
224 <h4>Troubleshooting</h4>
225 <dl>
1536eb6d 226 <dt>The progress bar never finishes.</dt>
66a99343 227 <dd>Close the upload popup, make sure you are connected to the Internet, and try again. If that doesn't work, try again, selecting a different keyserver.</dd>
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228<dt>My key doesnt appear in the list</dt>
229 <dd>Try checking Show Default Keys.</dd>
a60a6e36 230
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231 <dt class="feedback">Don't see a solution to your problem?</dt>
232 <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
601e0398 233
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234 </dl>
235 </div><!-- /.troubleshooting -->
8bd50444 236 </div><!-- End .main -->
d8b88fc2 237 </div><!-- End #step-2b .step -->
e155c686 238
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239 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
240 <div id="terminology" class="step">
241 <div class="main">
242 <h3>GnuPG, OpenPGP, what?</h3>
243 <p>You're using a program called GnuPG, but the menu in your email program is called OpenPGP. Confusing, right? In general, the terms GnuPG, GPG, GNU Privacy Guard, OpenPGP and PGP are used interchangeably, though they all have slightly different meanings.</p>
244 </div><!-- End .main -->
245 </div><!-- End #terminology.step-->
246
8bd50444 247
bdf319c4 248 </div>
6c495e2d 249 </section><!-- End #section2 -->
bdf319c4 250
2cb815ae 251<!-- ~~~~~~~~~ Section 3: Try it out ~~~~~~~~~ -->
6c495e2d 252 <section class="row" id="section3">
bdf319c4 253 <div>
5c207a4d 254 <!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
2378bdbf 255 <div class="section-intro">
2378bdbf 256 <h2><em>#3</em> Try it out!</h2>
b3d5c595 257 <p>Now you'll try a test correspondence with a computer program named Edward, which knows how to use encryption. Except where noted, these are the same steps you'd follow when corresponding with a real, live person.</p>
3568a584 258 </div><!-- End .section-intro -->
5c207a4d 259
2cb815ae 260 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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261 <div id="step-3a" class="step">
262 <div class="sidebar">
de0ab142 263 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section3-try-it-out.png" alt="Try it out." /></p>
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264 </div><!-- /.sidebar -->
265 <div class="main">
b3d5c595 266 <h3><em>Step 3.a</em> Send Edward your public key</h3>
3fe46e6b 267 <p>This is a special step that you won't have to do when corresponding with real people. In your email program's menu, go to OpenPGP &rarr; Key Management. You should see your key in the list that pops up. Right click on your key and select Send Public Keys by Email. This will create a new draft message, as if you had just hit the Write button.</p>
43bd32d7 268
fd188212 269<p>Address the message to edward-en@fsf.org. Put at least one word (whatever you want) in the subject and body of the email, then hit send.</p>
43bd32d7 270
b3d5c595 271<p class="notes">It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the <a href="#section5">Use it Well</a> section of this guide. Once he's responded, head to the next step. From here on, you'll be doing just the same thing as when corresponding with a real person.</p>
2378bdbf 272 </div><!-- End .main -->
d8b88fc2 273 </div><!-- End #step-3a .step -->
6c495e2d 274
2cb815ae 275 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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276 <div id="step-3b" class="step">
277 <div class="main">
278 <h3><em>Step 3.b</em> Send a test encrypted email</h3>
b3d5c595 279 <p>Write a new email in your email program, addressed to edward-en@fsf.org. Make the subject "Encryption test" or something similar and write something in the body. Don't send it yet.</p>
941218c0 280 <p>Click the icon of the key in the bottom right of the composition window (it should turn yellow). This tells Enigmail to encrypt the email.</p>
d325c924 281 <p class="notes">Next to the key, you'll notice an icon of a pencil. Clicking this tells Enigmail to add a special, unique signature to your message, generated using your private key. This is a separate feature from encryption, and you don't have to use it for this guide.</p>
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282 <p>Click Send. Enigmail will pop up a window that says "Recipients not valid, not trusted or not found."</p>
283
357dc69d 284 <p>To encrypt an email to Edward, you need his public key, so now you'll have Enigmail download it from a keyserver. Click Download Missing Keys and use the default in the pop-up that asks you to choose a keyserver. Once it finds keys, check the first one (Key ID starting with C), then select ok. Select ok in the next pop-up.</p>
5c207a4d 285
b3d5c595 286 <p>Now you are back at the "Recipients not valid, not trusted or not found" screen. Select Edward's key from the list and click Ok. If the message doesn't send automatically, you can hit send now.</p>
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287 <!-- ~~~~~~~~~ Troubleshooting ~~~~~~~~~ -->
288 <div class="troubleshooting">
289 <h4>Troubleshooting</h4>
290 <dl>
b3d5c595 291 <dt>Enigmail can't find Edward's key</dt>
5c207a4d 292 <dd>Close the pop-ups that have appeared since you clicked. Make sure you are connected to the Internet and try again. If that doesn't work, repeat the process, choosing a different keyserver when it asks you to pick one.</dd>
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293 <dt class="feedback">Don't see a solution to your problem?</dt>
294 <dd class="feedback">Please let us know on the <a href="https://libreplanet.org/wiki/GPG_guide/Public_Review">feedback page</a>.</dd>
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295 </dl>
296 </div><!-- /.troubleshooting -->
297 </div><!-- End .main -->
298 </div><!-- End #step-3b .step -->
43bd32d7 299
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300 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
301 <div id="step-headers_unencrypted" class="step">
302 <div class="main">
6e1b0fa2 303 <h3><em>Important:</em> Security tips</h3>
81e841e8 304 <p>Even if you encrypted your email, the subject line is not encrypted, so don't put private information there. The sending and receiving addresses aren't encrypted either, so they could be read by a surveillance system. When you send attachments, Enigmail will give you an option of whether you want to encrypt them.</p>
6e1b0fa2 305<p>It's also good practice to click the key icon in your email composition window <strong>before</strong> you start to write. Otherwise, your email client could save an unencrypted draft on the mail server, potentially exposing it to snooping.</p>
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306 </div><!-- End .main -->
307 </div><!-- End #step-headers_unencrypted .step-->
308
309
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310 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
311 <div id="step-3c" class="step">
312 <div class="main">
313 <h3><em>Step 3.c</em> Receive a response</h3>
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314 <p>When Edward receives your email, he will use his private key to decrypt it, then fetch your public key from a keyserver and use it to encrypt a response to you.</p>
315 <p class="notes">Since you encrypted this email with Edward's public key, Edward's private key is required to decrypt it. Edward is the only one with his private key, so no one except him &mdash; not even you &mdash; can decrypt it.</p>
316 <p class="notes">It may take two or three minutes for Edward to respond. In the meantime, you might want to skip ahead and check out the <a href="#section5">Use it Well</a> section of this guide.</p>
317 <p>When you receive Edward's email and open it, Enigmail will automatically detect that it is encrypted with your public key, and then it will use your private key to decrypt it.</p>
318 <p>Notice the bar that Enigmail shows you above the message, with information about the status of Edward's key.</p>
2378bdbf 319 </div><!-- End .main -->
43bd32d7 320 </div><!-- End #step-3c .step -->
6c495e2d 321
61bbfa91 322<!-- STEP 3D IS COMMENTED OUT UNTIL WE FIND A WAY TO VALIDATE SIGNATURES
43bd32d7 323 <div id="step-3d" class="step">
2378bdbf 324 <div class="main">
43bd32d7 325 <h3><em>Step 3.d</em> Send a test signed email to a friend</h3>
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326 <p>Write a new email in your email program, addressed to a friend. If you want, tell them about this guide!</p>
327 <p>Before sending the email, click the icon of the pencil in the bottom right of the composition window (it should turn yellow). This tells Enigmail to sign the email with you private key.</p>
328 <p>After you click send, Enigmail will ask you for your password. It will do this any time it needs to use your public key.</p>
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329 </div>
330 </div>-->
bdf319c4 331 </div>
d351e1bf 332 </section><!-- End #section3 -->
61bbfa91 333
bdf319c4 334
2cb815ae 335<!-- ~~~~~~~~~ Section 4: Learn the Web of Trust ~~~~~~~~~ -->
6c495e2d 336 <section class="row" id="section4">
bdf319c4 337 <div>
5c207a4d 338 <!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
2378bdbf 339 <div class="section-intro">
2378bdbf 340 <h2><em>#4</em> Learn the Web of Trust</h2>
b0ce405b 341 <p>Email encryption is a powerful technology, but it has a weakness; it requires a way to verify that a person's public key is actually theirs. Otherwise, there would be no way to stop an attacker from making an email address with your friend's name, creating keys to go with it and impersonating your friend. That's why the free software programmers that developed email encryption created keysigning and the Web of Trust.</p>
eacb2880 342
66a99343 343<p>When you sign someone's key, you are publicly saying that you trust that it does belong to them and not an impostor. People who use your public key can see the number of signatures it has. Once you've used GnuPG for a long time, you may have hundreds of signatures. The Web of Trust is the constellation of all GnuPG users, connected to each other by chains of trust expressed through signatures, forming a giant network. The more signatures a key has, and the more signatures its signers' keys have, the more trustworthy that key is.</p>
eacb2880 344
2334cfdb 345<p>People's public keys are usually identified by their key fingerprint, which is a string of digits like F357AA1A5B1FA42CFD9FE52A9FF2194CC09A61E8 (for Edward's key). You can see the fingerprint for your public key, and other public keys saved on your computer, by going to OpenPGP &rarr; Key Management in your email program's menu, then right clicking on the key and choosing Key Properties. It's good practice to share your fingerprint wherever you share your email address, so that people can double-check that they have the correct public key when they download yours from a keyserver.</p>
6ce3ff70 346
2334cfdb 347<p class="notes">You may also see public keys referred to by their key ID, which is simply the last 8 digits of the fingerprint, like C09A61E8 for Edward. The key ID is visible directly from the Key Management Window. This key ID is like a person's first name (it is a useful shorthand but may not be unique to a given key), whereas the fingerprint actually identifies the key uniquely without the possibility of confusion. If you only have the key ID, you can still look up the key (as well as its fingerprint), like you did in Step 3, but if multiple options appear, you'll need the fingerprint of the person to whom are trying to communicate to verify which one to use.</p>
6ce3ff70 348
eacb2880 349
2378bdbf 350 </div><!-- End .section-intro -->
6c495e2d 351
2cb815ae 352 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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353 <div id="step-4a" class="step">
354 <div class="sidebar">
de0ab142 355 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section4-web-of-trust.png" alt="Section 4: Web of Trust" /></p>
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356 </div><!-- /.sidebar -->
357 <div class="main">
358 <h3><em>Step 4.a</em> Sign a key</h3>
1a7754f4 359 <p>In your email program's menu, go to OpenPGP &rarr; Key Management.</p>
b3d5c595 360 <p>Right click on Edward's public key and select Sign Key from the context menu.</p>
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361 <p>In the window that pops up, select "I will not answer" and click ok.</p>
362 <p>In your email program's menu, go to OpenPGP &rarr; Key Management &rarr; Keyserver &rarr; Upload Public Keys and hit ok.</p>
b3d5c595 363 <p class="notes">You've just effectively said "I trust that Edward's public key actually belongs to Edward." This doesn't mean much because Edward isn't a real person, but it's good practice.</p>
eacb2880 364
399c9783 365
0fe6e02e 366 <!--<div id="pgp-pathfinder">
399c9783 367 <form enctype="application/x-www-form-urlencoded" action="/mk_path.cgi" method="get">
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368 <p><strong>From:</strong> <input type="text" placeholder="xD41A008" name="FROM"></p>
369 <p><strong>To:</strong> <input type="text" placeholder="50BD01x4" name="TO"></p>
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370 <p class="buttons"><input type="submit" value="trust paths" name="PATHS"> <input type="reset" value="reset" name=".reset"></p>
371 </form>
372 </div><!-- End #pgp-pathfinder -->
373
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374 </div><!-- End .main -->
375 </div><!-- End #step-4a .step -->
e155c686 376
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377 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
378 <div id="step-sign_real_keys" class="step">
379 <div class="main">
380 <h3><em>Important:</em> check people's identification before signing their keys</h3>
19d4fe06 381 <p>Before signing a real person's key, always make sure it actually belongs to them, and that they are who they say they are. Ask them to show you their ID (unless you trust them very highly) and their public key fingerprint -- not just the shorter public key ID, which could refer to another key as well. In Enigmail, answer honestly in the window that pops up and asks "How carefully have you verified that the key you are about to sign actually belongs to the person(s) named above?".</p>
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382 </div><!-- End .main -->
383 </div><!-- End #step-sign_real_keys .step-->
384
385
386
bdf319c4 387 </div>
6c495e2d 388 </section><!-- End #section4 -->
bdf319c4 389
2cb815ae 390<!-- ~~~~~~~~~ Section 5: Use it well ~~~~~~~~~ -->
5c207a4d 391 <section id="section5" class="row">
bdf319c4 392 <div>
5c207a4d 393 <!-- ~~~~~~~~~ section introduction: interspersed text ~~~~~~~~~ -->
2378bdbf 394 <div class="section-intro">
2378bdbf 395 <h2><em>#5</em> Use it well</h2>
19e80165 396<p>Everyone uses GnuPG a little differently, but it's important to follow some basic practices to keep your email secure. Not following them, you risk the privacy of the people you communicate with, as well as your own, and damage the Web of Trust.</p>
2378bdbf 397 </div><!-- End .section-intro -->
6c495e2d 398
2cb815ae 399 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
2378bdbf 400 <div id="step-5a" class="step">
3fe46e6b 401 <div class="sidebar">
de0ab142 402 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section5-01-use-it-well.png" alt="Section 5: Use it Well" /></p>
3fe46e6b 403 </div><!-- /.sidebar -->
2378bdbf 404 <div class="main">
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405 <h3>When should I encrypt?</h3>
406
66a99343 407 <p>The more you can encrypt your messages, the better. If you only encrypt emails occasionally, each encrypted message could raise a red flag for surveillance systems. If all or most of your email is encrypted, people doing surveillance won't know where to start.</p>
19e80165 408
acd2fb80 409<p>That's not to say that only encrypting some of your email isn't helpful -- it's a great start and it makes bulk surveillance more difficult.</p>
0a225228 410
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411 </div><!-- End .main -->
412 </div><!-- End #step-5a .step -->
413
7e60af07 414 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
2378bdbf 415 <div id="step-5b" class="step">
7e60af07 416 <div class="sidebar">
de0ab142 417 <p><img src="//static.fsf.org/nosvn/enc-dev0/img/en/screenshots/section5-02-use-it-well.png" alt="Section 5: Use it Well" /></p>
7e60af07 418 </div><!-- /.sidebar -->
2378bdbf 419 <div class="main">
034f3546 420 <h3><em>Important:</em> Be wary of invalid keys</h3>
40e65992 421 <p>GnuPG makes email safer, but it's still important to watch out for invalid keys, which might have fallen into the wrong hands. Email encrypted with invalid keys might be readable by surveillance programs.</p>
b3d5c595 422 <p>In your email program, go back to the second email that Edward sent you. Because Edward encrypted it with your public key, it will have a message from OpenPGP at the top, which most likely says "OpenPGP: Part of this message encrypted."</p>
023d4279 423<p><b>When using GnuPG, make a habit of glancing at that bar. The program will warn you there if you get an email encrypted with a key that can't be trusted.</b></p>
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424 </div><!-- End .main -->
425 </div><!-- End #step-5b .step -->
6c495e2d 426
7e60af07 427 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
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428 <div id="step-5c" class="step">
429 <div class="main">
19e80165 430 <h3>Copy your revocation certificate to somewhere safe</h3>
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431 <p>Remember when you created your keys and saved the revocation certificate that GnuPG made? It's time to copy that certificate onto the safest digital storage that you have -- the ideal thing is a flash drive, disk, or hard drive stored in a safe place in your home.</p>
432<p>If your private key ever gets lost or stolen, you'll need this certificate file to let people know that you are no longer using that keypair.</p>
2378bdbf 433 </div><!-- End .main -->
19e80165 434 </div><!-- End #step-5c .step -->
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435
436 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~ -->
437 <div id="step-lost_key" class="step">
438 <div class="main">
19e80165 439 <h3><em>Important:</em> act swiftly if someone gets your private key</h3>
034f3546 440 <p>If you lose your private key or someone else gets ahold of it (say, by stealing or cracking your computer), it's important to revoke it immediately before someone else uses it to read your encrypted email. This guide doesn't cover how to revoke a key, but you can follow the <a href="https://www.gnupg.org/gph/en/manual.html#AEN305">instructions on the GnuPG site</a>. After you're done revoking, send an email to everyone with whom you usually use your key to make sure they know.</p>
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441 </div><!-- End .main -->
442 </div><!-- End #step-lost_key .step-->
443
0a225228 444 <!-- ~~~~~~~~~ a div for each step ~~~~~~~~~
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445 <div id="step-5d" class="step">
446 <div class="main">
b0ce405b 447 <h3>Make your public key part of your online identity</h3>
be23bf7b 448 <p> First add your public key fingerprint to your email signature, then compose an email to at least five of your friends, telling them you just set up GnuPG and mentioning your public key fingerprint. Link to this guide and ask them to join you. Don't forget that there's also an awesome <a href="infographic.html">infographic to share.</a></p>
b0ce405b 449
be23bf7b 450<p class="notes">Start writing your public key fingerprint anywhere someone would see your email address: your social media profiles, blog, Website, or business card. (At the Free Software Foundation, we put ours on our <a href="https://fsf.org/about/staff">staff page</a>.) We need to get our culture to the point that we feel like something is missing when we see an email address without a public key fingerprint.</p>
0a225228 451 </div><!-- End .main
bbfaa44d 452 </div> End #step-5d .step-->
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453
454
bdf319c4 455 </div>
6c495e2d 456 </section><!-- End #section5 -->
bdf319c4 457
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458
459
2cb815ae 460<!-- ~~~~~~~~~ Section 6: Next steps ~~~~~~~~~ -->
6c495e2d 461 <section class="row" id="section6">
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462 <div id="step-click_here" class="step">
463 <div class="main">
c6345aa7 464 <h2><a href="next_steps.html">Great job! Check out the next steps.</a></h2>
0a225228 465
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466 </div><!-- End .main -->
467 </div><!-- End #step-click_here .step-->
bb28ee32 468
6c495e2d 469 </section><!-- End #section6 -->
bdf319c4 470
2cb815ae 471<!-- ~~~~~~~~~ FAQ ~~~~~~~~~ -->
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472<!-- When un-commenting this section go to main.css and search
473 for /* Guide Sections Background */ then add #faq to the desired color
0a225228 474
6c495e2d 475 <section class="row" id="faq">
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476 <div>
477 <div class="sidebar">
478 <h2>FAQ</h2>
f44dd62f 479 </div>
6c495e2d 480
bdf319c4 481 <div class="main">
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482 <dl>
483 <dt>My key expired</dt>
484 <dd>Answer coming soon.</dd>
485
486 <dt>Who can read encrypted messages? Who can read signed ones?</dt>
487 <dd>Answer coming soon.</dd>
488
489 <dt>My email program is opening at times I don't want it to open/is now my default program and I don't want it to be.</dt>
490 <dd>Answer coming soon.</dd>
491 </dl>
f44dd62f 492 </div>
bdf319c4 493 </div>
f44dd62f 494 </section> --><!-- End #faq -->
bdf319c4 495
2cb815ae 496<!-- ~~~~~~~~~ Footer ~~~~~~~~~ -->
6c495e2d 497 <footer class="row" id="footer">
bdf319c4 498 <div>
bdf319c4 499 <div id="copyright">
c1ea5176 500 <h4><a href="https://u.fsf.org/ys"><img alt="Free Software Foundation" src="//static.fsf.org/nosvn/enc-dev0/img/fsf-logo.png" /></a></h4>
6aec3aeb 501 <p>Copyright &copy; 2014 <a href="https://u.fsf.org/ys">Free Software Foundation</a>, Inc. <a href="https://my.fsf.org/donate/privacypolicy.html">Privacy Policy</a>. <a href="https://u.fsf.org/yr">Join.</a></p>
6e82b600 502 <p><em>Version 2.1. <a href="http://agpl.fsf.org/emailselfdefense.fsf.org/edward/CURRENT/edward.tar.gz">Source code of Edward reply bot by Josh Drake &lt;zamnedix@gnu.org&gt; available under the GNU General Public License.</a></em></p>
0db2fdd1 503<p>The images on this page are under a <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 license (or later version)</a>, and the rest of it is under a <a href="https://creativecommons.org/licenses/by-sa/4.0">Creative Commons Attribution-ShareAlike 4.0 license (or later version)</a>. &mdash; <a href="http://www.gnu.org/licenses/license-list.html#OtherLicenses">Why these licenses?</a></p>
d325c924 504 <p>Download the source package for <a href="emailselfdefense_source.zip">this guide</a>. Fonts used in the guide &amp; infographic: <a href="https://www.google.com/fonts/specimen/Dosis">Dosis</a> by Pablo Impallari, <a href="http://www.google.com/fonts/specimen/Signika">Signika</a> by Anna Giedry&#347;, <a href="http://www.google.com/fonts/specimen/Archivo+Narrow">Archivo Narrow</a> by Omnibus-Type, <a href="http://www.thegopherarchive.com/gopher-files-hacks-pxl2000-119351.htm">PXL-2000</a> by Florian Cramer.</p>
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505 <p>
506 <a href="//weblabels.fsf.org/emailselfdefense.fsf.org/"
507 rel="jslicense">
508 JavaScript license information
509 </a>
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6c495e2d 511 </div><!-- /#copyright -->
7e60af07 512 <p class="credits">
2013b270 513 Infographic and guide design by <a rel="external" href="http://jplusplus.org"><strong>Journalism++</strong> <img src="//static.fsf.org/nosvn/enc-dev0/img/jplusplus.png" alt="Journalism++" /></a>
7e60af07 514 </p><!-- /.credits -->
bdf319c4 515 </div>
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516 </footer><!-- End #footer -->
517
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561 </body>
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