Difference between revisions of "OTR"

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[http://www.cypherpunks.ca/otr/ 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.
[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)
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* [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)
* [https://github.com/redsolution/xabber-android Xabber] (Android)
* [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://www.cypherpunks.ca/otr/#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://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://www.xchat.org/ XChat] (Cross-platform) with [http://irssi-otr.tuxfamily.org/ xchat-otr]
* [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 ==
* [http://www.cypherpunks.ca/otr/ Homepage]
* [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]
* [http://www.cypherpunks.ca/otr/Protocol-v2-3.1.0.html Off-the-Record Messaging Protocol version 2]
* [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

Plugin

Work in Progress

External links