Difference between revisions of "OTR"
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* [http://pidgin.im/ Pidgin (formely Gaim)] (Cross-platform) with [https://otr.cypherpunks.ca/#downloads OTR plugin for Pidgin] | * [http://pidgin.im/ Pidgin (formely Gaim)] (Cross-platform) with [https://otr.cypherpunks.ca/#downloads OTR plugin for Pidgin] | ||
* [http://poez.io/ Poezio] with [http://poez.io/doc/plugins/otr.html pure-python-otr] | * [http://poez.io/ Poezio] with [http://poez.io/doc/plugins/otr.html pure-python-otr] | ||
* [http://salut-a-toi.org Salut à Toi] with | * [http://salut-a-toi.org Salut à Toi] with plugin_sec_otr.py (installed by default) | ||
* [http://www.trillian.im/ Trillian] (Microsoft Windows) with [http://trillianotr.kittyfox.net/ Trillian OTR] | * [http://www.trillian.im/ Trillian] (Microsoft Windows) with [http://trillianotr.kittyfox.net/ Trillian OTR] | ||
* [http://weechat.flashtux.org/ WeeChat] (Cross-platform) with [http://irssi-otr.tuxfamily.org/ weechat-otr] | * [http://weechat.flashtux.org/ WeeChat] (Cross-platform) with [http://irssi-otr.tuxfamily.org/ weechat-otr] | ||
Revision as of 17:30, 13 November 2014
Off-the-Record Messaging, commonly referred to as OTR, is a cryptographic protocol that provides strong encryption for instant messaging conversations. OTR uses a combination of the AES symmetric-key algorithm, the Diffie–Hellman key exchange, and the SHA-1 hash function. In addition to authentication and encryption, OTR provides perfect forward secrecy and malleable encryption.
Strengths
OTR allows you to have private conversations over instant messaging by providing:
- Encryption
- No one else can read your instant messages.
- Authentication
- You are assured the correspondent is who you think it is.
- Deniability
- The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages he sees are authentic and unmodified.
- Perfect forward secrecy
- If you lose control of your private keys, no previous conversation is compromised.
Client support
Native
- Adium (Mac OS X)
- BitlBee (Cross-platform)
- Blink Cocoa(Cross-platform)
- CenterIM (Unix-like)
- climm (Unix-like)
- ChatSecure (formerly Gibberbot) (Android, iPhone, Mac, Linux or PC)
- Jitsi (formerly SIP Communicator) (Cross-platform)
- MCabber (Unix-like)
- Phoenix Viewer, a Second Life client (Cross-platform)
- Profanity: OTR page
- Psi+ (Cross-platform)
- Vacuum IM (Cross-platform)
- Xabber (Android)
- yaxim (Android)
Plugin
- Gajim (Cross-platform) with Off-The-Record Encryption for Gajim
- irssi (Cross-platform) with irssi-otr
- Kopete (Unix-like) with Kopete Off-the-Record plugin
- Miranda IM (Microsoft Windows) with MirOTR - OTR for Miranda IM
- Miranda NG (Microsoft Windows) with MirOTR - OTR for Miranda NG
- Pidgin (formely Gaim) (Cross-platform) with OTR plugin for Pidgin
- Poezio with pure-python-otr
- Salut à Toi with plugin_sec_otr.py (installed by default)
- Trillian (Microsoft Windows) with Trillian OTR
- WeeChat (Cross-platform) with weechat-otr
- XChat (Cross-platform) with xchat-otr