The first version 0.8.0 of the reference implementation was published on 21 November 2004. Brewer as an improvement over the OpenPGP and the S/MIME system at the "Workshop on Privacy in the Electronic Society" (WPES). OTR was presented in 2004 by Nikita Borisov, Ian Avrum Goldberg, and Eric A. This version aims to provide online and offline deniability, to update the cryptographic primitives, and to support out-of-order delivery and asynchronous communication. Version 4 of the protocol is currently being designed by a team led by Sofía Celi, and reviewed by Nik Unger and Ian Goldberg. A Pidgin and Kopete plugin exists that allows OTR to be used over any IM protocol supported by Pidgin or Kopete, offering an auto-detection feature that starts the OTR session with the buddies that have it enabled, without interfering with regular, unencrypted conversations. They provide a client library to facilitate support for instant messaging client developers who want to implement the protocol. The OTR protocol was designed by cryptographers Ian Goldberg and Nikita Borisov and released on 26 October 2004. The initial introductory paper was named "Off-the-Record Communication, or, Why Not To Use PGP".
This is in contrast with cryptography tools that produce output which can be later used as a verifiable record of the communication event and the identities of the participants. The primary motivation behind the protocol was providing deniable authentication for the conversation participants while keeping conversations confidential, like a private conversation in real life, or off the record in journalism sourcing. In addition to authentication and encryption, OTR provides forward secrecy and malleable encryption. OTR uses a combination of AES symmetric-key algorithm with 128 bits key length, the Diffie–Hellman key exchange with 1536 bits group size, and the SHA-1 hash function. Off-the-Record Messaging ( OTR) is a cryptographic protocol that provides encryption for instant messaging conversations.
0 kommentar(er)
