Difference between revisions of "OTR"
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[ | [https://otr.cypherpunks.ca/ 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 == | == Strengths == | ||
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* [http://adium.im/ Adium] (Mac OS X) | * [http://adium.im/ Adium] (Mac OS X) | ||
* [http://bitlbee.org/ BitlBee] (Cross-platform) | * [http://bitlbee.org/ BitlBee] (Cross-platform) | ||
* [http://icanblink.com/ Blink Cocoa](Cross-platform) | |||
* [http://centerim.org/ CenterIM] (Unix-like) | * [http://centerim.org/ CenterIM] (Unix-like) | ||
* [http://climm.org/ climm] (Unix-like) | * [http://climm.org/ climm] (Unix-like) | ||
| Line 24: | Line 25: | ||
* [http://psi-plus.com/ Psi+] (Cross-platform) | * [http://psi-plus.com/ Psi+] (Cross-platform) | ||
* [http://vacuum-im.org/ Vacuum IM] (Cross-platform) | * [http://vacuum-im.org/ Vacuum IM] (Cross-platform) | ||
* [ | * [http://www.xabber.org/ Xabber] (Android) | ||
* [http://yaxim.org/ yaxim] (Android) | * [http://yaxim.org/ yaxim] (Android) | ||
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* [http://miranda-im.org/ Miranda IM] (Microsoft Windows) with [https://code.google.com/p/mirotr/ MirOTR - OTR for Miranda IM!] | * [http://miranda-im.org/ Miranda IM] (Microsoft Windows) with [https://code.google.com/p/mirotr/ MirOTR - OTR for Miranda IM!] | ||
* [http://miranda-ng.org/ Miranda NG] (Microsoft Windows) with [https://code.google.com/p/mirotr/ MirOTR - OTR for Miranda IM!] | * [http://miranda-ng.org/ Miranda NG] (Microsoft Windows) with [https://code.google.com/p/mirotr/ MirOTR - OTR for Miranda IM!] | ||
* [http://pidgin.im/ Pidgin] (Cross-platform) with [ | * [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://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] | ||
* [http:// | * [http://xchat.org/ XChat] (Cross-platform) with [http://irssi-otr.tuxfamily.org/ xchat-otr] | ||
=== Work in Progress === | === Work in Progress === | ||
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== External links == | == External links == | ||
* [ | * [https://otr.cypherpunks.ca/ Homepage] | ||
* [https://otr.cypherpunks.ca/software.php OTR-Enabled Software] | |||
* [https://otr.cypherpunks.ca/Protocol-v3-4.0.0.html Off-the-Record Messaging Protocol version 3] | * [https://otr.cypherpunks.ca/Protocol-v3-4.0.0.html Off-the-Record Messaging Protocol version 3] | ||
* [ | * [https://otr.cypherpunks.ca/Protocol-v2-3.1.0.html Off-the-Record Messaging Protocol version 2] | ||
Revision as of 12:00, 19 January 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)
- 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 IM!
- Pidgin (formely Gaim) (Cross-platform) with OTR plugin for Pidgin
- Poezio with pure-python-otr
- Trillian (Microsoft Windows) with Trillian OTR
- WeeChat (Cross-platform) with weechat-otr
- XChat (Cross-platform) with xchat-otr