about.mdwn 5.98 KB
Newer Older
1
[[!meta title="About"]]
2

3
> **amnesia**, *noun*:<br/>
Tails developers's avatar
Tails developers committed
4 5 6 7 8
> forgetfulness; loss of long-term memory.

> **incognito**, *adjective & adverb*:<br/>
> (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.
12

13
It is a complete operating system designed to be used from a DVD, USB stick, or SD card
14
independently of the computer's original operating system. It is [[Free
15
Software|doc/about/license]] and based on [[Debian GNU/Linux|https://www.debian.org/]].
16

Tails developers's avatar
Tails developers committed
17
Tails comes with several built-in applications pre-configured with security in
18 19
mind: web browser, instant messaging client, email client, office suite, image
and sound editor, etc.
Tails developers's avatar
Tails developers committed
20

Tails developers's avatar
Tails developers committed
21 22
[[!toc levels=1]]

Tails developers's avatar
Tails developers committed
23 24
<a id="tor"></a>

25 26
Online anonymity and censorship circumvention
=============================================
Tails developers's avatar
Tails developers committed
27

sajolida's avatar
sajolida committed
28 29 30
Tor
---

31 32
Tails relies on the Tor anonymity network to protect your privacy
online:
Tails developers's avatar
Tails developers committed
33

34 35 36
  - all software is configured to connect to the Internet through Tor
  - if an application tries to connect to the Internet directly, the
    connection is automatically blocked for security.
Tails developers's avatar
Tails developers committed
37 38 39 40

Tor is free software and an open network that helps you defend against a form of
network surveillance that threatens personal freedom and privacy, confidential
business activities and relationships, and state security known as traffic
Tails developers's avatar
Tails developers committed
41
analysis.
Tails developers's avatar
Tails developers committed
42 43 44 45 46 47

Tor protects you by bouncing your communications around a distributed network of
relays run by volunteers all around the world: it prevents somebody watching
your Internet connection from learning what sites you visit, and it prevents the
sites you visit from learning your physical location.

48 49 50 51 52 53 54
Using Tor you can:

  - be anonymous online by hiding your location,
  - connect to services that would be censored otherwise;
  - resist attacks that block the usage of Tor using circumvention tools
    such as [[bridges|doc/first_steps/startup_options/bridge_mode]].

Tails developers's avatar
Tails developers committed
55 56 57
To learn more about Tor, see the official [Tor
website](https://www.torproject.org/):

Tails developers's avatar
Tails developers committed
58
- [Tor overview: Why we need
Tails developers's avatar
Tails developers committed
59
  Tor](https://www.torproject.org/about/overview.html.en#whyweneedtor)
Tails developers's avatar
Tails developers committed
60
- [Tor overview: How does Tor
Tails developers's avatar
Tails developers committed
61 62
  work](https://www.torproject.org/about/overview.html.en#thesolution)
- [Who uses Tor?](https://www.torproject.org/about/torusers.html.en)
Tails developers's avatar
Tails developers committed
63 64
- [Understanding and Using Tor — An Introduction for the
  Layman](https://trac.torproject.org/projects/tor/wiki/doc/TorALaymansGuide)
Tails developers's avatar
Tails developers committed
65

66 67 68
To learn more about how the usage of Tor is enforced, see our [[design
document|contribute/design/Tor_enforcement]].

sajolida's avatar
sajolida committed
69 70 71
I2P
---

72
You can also use Tails to access
73
[[I2P|doc/anonymous_internet/i2p]]. To know how it is implemented in
74
Tails, see the [[design document|contribute/design/I2P]].
75

76 77
To learn more about I2P, see the
official [I2P website](https://geti2p.net).
78

Tails developers's avatar
Tails developers committed
79 80
<a id="amnesia"></a>

Tails developers's avatar
Tails developers committed
81
Use anywhere but leave no trace
Tails developers's avatar
Tails developers committed
82
===============================
Tails developers's avatar
Tails developers committed
83 84

Using Tails on a computer doesn't alter or depend on the operating system
85
installed on it. So you can use it in the same way on your computer, a
86
friend's or one at your local library. After shutting down Tails,
Tails developers's avatar
Tails developers committed
87 88
the computer can start again on its usual operating system.

89 90 91
Tails is configured with special care to not use the computer's hard-disks,
even if there is some swap space on them. The only storage space used by Tails is
the RAM, which is automatically erased when the computer shuts down. So
Tails developers's avatar
Tails developers committed
92 93 94 95 96
you won't leave any trace neither of the Tails system nor of what you did on
the computer. That's why we call it "amnesic".

This allows you to work on sensitive documents on any computer and protect you
from data recovery after shutdown. Of course, you can still explicitly save
97
some documents to another USB or external hard-disk and take them away for
Tails developers's avatar
Tails developers committed
98 99
future use.

100 101
<a id="cryptography"></a>

Tails developers's avatar
Typo.  
Tails developers committed
102
State-of-the-art cryptographic tools
103 104 105 106 107
====================================

Tails also comes with a selection of tools to protect your data using strong
encryption:

Tails developers's avatar
Tails developers committed
108 109
  - [[Encrypt your USB sticks or external
    hard-disks|doc/encryption_and_privacy/encrypted_volumes]] using <span
110 111 112
    class="definition">[[!wikipedia LUKS]]</span>, the Linux standard for
    disk-encryption.

Tails developers's avatar
Tails developers committed
113
  - Automatically encrypt with HTTPS all your communications to a number of
114 115
    major websites using [HTTPS
    Everywhere](https://www.eff.org/https-everywhere), a Firefox extension
Tails developers's avatar
Tails developers committed
116
    developed by the [Electronic Frontier Foundation](https://www.eff.org).
117

118
  - Encrypt and sign your emails and documents using the *de facto* standard
119
    <span class="definition">[[!wikipedia OpenPGP]]</span> either from Tails
Tails developers's avatar
Tails developers committed
120
    email client, text editor or file browser.
121 122 123 124 125 126

  - Protect your instant messaging conversations using <span
    class="definition">[[!wikipedia Off-the-Record_Messaging
    desc="OTR"]]</span>, a cryptographic tool that provides encryption,
    authentication and deniability.

Tails developers's avatar
Tails developers committed
127 128 129 130 131 132
  - [[Securely delete your files|doc/encryption_and_privacy/secure_deletion]]
    and clean your diskspace using [[Nautilus
    Wipe|http://wipetools.tuxfamily.org/nautilus-wipe.html]].

[[Read more about those tools in the documentation.|doc/encryption_and_privacy]]

133 134 135 136 137
What's next?
============

To continue discovering Tails, you can now read:

138
  - the [[warning page|doc/about/warning]] to understand better the security limitations of Tails and Tor,
Tails developers's avatar
Tails developers committed
139
  - more details about the [[features and software|doc/about/features]] included in Tails,
140
  - our [[documentation|doc]] explaining in detail how to use Tails,
Tails developers's avatar
Tails developers committed
141
  - some hints on why [[should you trust Tails|doc/about/trust]],
142 143
  - our [[design document|contribute/design]] about Tails specification, threat model and implementation,
  - the [[calendar|contribute/calendar]] holds the release dates, meetings and other events.
Tails developers's avatar
Tails developers committed
144

Tails developers's avatar
Tails developers committed
145
Press and media
146 147
===============

Tails developers's avatar
Tails developers committed
148
See [[Press and media information|press]].
149

150 151 152
Acknowledgments and similar projects
====================================

Tails developers's avatar
Tails developers committed
153
See [[Acknowledgments and similar projects|doc/about/acknowledgments_and_similar_projects]].