1 [[!meta title="About"]]
3 > **amnesiac**, *noun*:<br/>
4 > forgetfulness; loss of long-term memory.
6 > **incognito**, *adjective & adverb*:<br/>
7 > (of a person) having one's true identity concealed.
9 Tails is a live system that aims to preserve your privacy and anonymity. It
10 helps you to use the Internet anonymously and circumvent censorship almost anywhere you go and on any
11 computer but leaving no trace unless you ask it to explicitly.
13 It is a complete operating system designed to be used from a DVD or a USB stick
14 independently of the computer's original operating system. It is [[Free
15 Software|doc/about/license]] and based on [[Debian GNU/Linux|http://www.debian.org/]].
17 Tails comes with several built-in applications pre-configured with security in
18 mind: web browser, instant messaging client, email client, office suite, image
19 and sound editor, etc.
23 Online anonymity and censorship circumvention with Tor
24 ======================================================
26 Tails relies on the Tor anonymity network to protect your privacy
29 - all software is configured to connect to the Internet through Tor
30 - if an application tries to connect to the Internet directly, the
31 connection is automatically blocked for security.
33 Tor is free software and an open network that helps you defend against a form of
34 network surveillance that threatens personal freedom and privacy, confidential
35 business activities and relationships, and state security known as traffic
38 Tor protects you by bouncing your communications around a distributed network of
39 relays run by volunteers all around the world: it prevents somebody watching
40 your Internet connection from learning what sites you visit, and it prevents the
41 sites you visit from learning your physical location.
45 - be anonymous online by hiding your location,
46 - connect to services that would be censored otherwise;
47 - resist attacks that block the usage of Tor using circumvention tools
48 such as [[bridges|doc/first_steps/startup_options/bridge_mode]].
50 To learn more about Tor, see the official [Tor
51 website](https://www.torproject.org/):
53 - [Tor overview: Why we need
54 Tor](https://www.torproject.org/about/overview.html.en#whyweneedtor)
55 - [Tor overview: How does Tor
56 work](https://www.torproject.org/about/overview.html.en#thesolution)
57 - [Who uses Tor?](https://www.torproject.org/about/torusers.html.en)
58 - [Understanding and Using Tor — An Introduction for the
59 Layman](https://trac.torproject.org/projects/tor/wiki/doc/TorALaymansGuide)
61 To learn more about how the usage of Tor is enforced, see our [[design
62 document|contribute/design/Tor_enforcement]].
64 Use anywhere but leave no trace
65 ===============================
67 Using Tails on a computer doesn't alter or depend on the operating system
68 installed on it. So you can use it in the same way on your computer, a
69 friend's or one at your local library. After removing your Tails DVD or USB stick
70 the computer can start again on its usual operating system.
72 Tails is configured with special care to not use the computer's hard-disks,
73 even if there is some swap space on them. The only storage space used by Tails is
74 the RAM, which is automatically erased when the computer shuts down. So
75 you won't leave any trace neither of the Tails system nor of what you did on
76 the computer. That's why we call it "amnesic".
78 This allows you to work on sensitive documents on any computer and protect you
79 from data recovery after shutdown. Of course, you can still explicitly save
80 some documents to another USB or external hard-disk and take them away for
83 <a id="cryptography"></a>
85 State-of-the-art cryptographic tools
86 ====================================
88 Tails also comes with a selection of tools to protect your data using strong
91 - [[Encrypt your USB sticks or external
92 hard-disks|doc/encryption_and_privacy/encrypted_volumes]] using <span
93 class="definition">[[!wikipedia LUKS]]</span>, the Linux standard for
96 - Automatically encrypt with HTTPS all your communications to a number of
97 major websites using [HTTPS
98 Everywhere](https://www.eff.org/https-everywhere), a Firefox extension
99 developed by the [Electronic Frontier Foundation](https://www.eff.org).
101 - Encrypt and sign your emails and documents using the *de facto* standard
102 <span class="definition">[[!wikipedia OpenPGP]]</span> either from Tails
103 email client, text editor or file browser.
105 - Protect your instant messaging conversations using <span
106 class="definition">[[!wikipedia Off-the-Record_Messaging
107 desc="OTR"]]</span>, a cryptographic tool that provides encryption,
108 authentication and deniability.
110 - [[Securely delete your files|doc/encryption_and_privacy/secure_deletion]]
111 and clean your diskspace using [[Nautilus
112 Wipe|http://wipetools.tuxfamily.org/nautilus-wipe.html]].
114 [[Read more about those tools in the documentation.|doc/encryption_and_privacy]]
119 To continue discovering Tails, you can now read:
121 - the [[warning page|doc/about/warning]] to understand better the security limitations of Tails and Tor,
122 - more details about the [[features and software|doc/about/features]] included in Tails,
123 - our [[documentation|doc]] explaining in detail how to use Tails,
124 - some hints on why [[should you trust Tails|doc/about/trust]],
125 - our [[design document|contribute/design]] about Tails specification, threat model and implementation.
130 See the [[Press and media information|press]].
135 - Tails could not exist without [[Debian|http://www.debian.org/]], [[Debian Live|http://live.debian.net]], and [[Tor|https://www.torproject.org/]]; see our [[contribute/relationship with upstream]] document for details.
136 - Tails was inspired by the [[Incognito LiveCD|http://web.archive.org/web/20090220133020/http://anonymityanywhere.com/]]. The Incognito author declared it to be dead on March 23rd, 2010, and wrote that Tails "should be considered as its spiritual successor".
137 - The [[Privatix Live-System|http://mandalka.name/privatix/]] an early source of inspiration, too.
138 - Some ideas (in particular [[tordate|contribute/design/Time_syncing]] and
139 improvements to our [[contribute/design/memory_erasure]] procedure) were
140 borrowed from [Liberté Linux](http://dee.su/liberte).
141 - Portions of Tails are based on TrueCrypt, freely available at [[http://www.truecrypt.org/]].
146 Feel free to contact us if you think that your project is missing, or
147 if some project is listed in the wrong category.
151 * [Liberté Linux](http://dee.su/liberte)
152 * [Lightweight Portable Security](http://www.spi.dod.mil/lipose.htm)
154 ## Discontinued, abandoned or sleeping projects
156 * [Odebian](http://www.odebian.org/)
157 * [Ubuntu Privacy Remix](https://www.privacy-cd.org/)
158 * [The Haven Project](https://www.haven-project.org/) (dead link)
159 * [Privatix](http://www.mandalka.name/privatix/)
160 * [Polippix](http://polippix.org/)
161 * [ISXUbuntu](http://www.isoc-ny.org/wiki/ISXubuntu)
162 * [Phantomix](http://phantomix.ytternhagen.de/)
163 * [Anonym.OS](http://sourceforge.net/projects/anonym-os/)
164 * [The Incognito LiveCD](http://anonymityanywhere.com/incognito/) (dead link)
165 * [ParanoidLinux](http://www.paranoidlinux.org/) (dead link)
166 * [onionOS](http://jamon.name/files/onionOS/) (dead link)
167 * [ELE](http://www.northernsecurity.net/download/ele/) (dead link)
168 * [Estrella Roja](http://distrowatch.com/table.php?distribution=estrellaroja)