OMEMO

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OMEMO is an extension to the Extensible Messaging and Presence Protocol (XMPP, "Jabber") for multi-client end-to-end encryption developed by Andreas Straub. According to Straub, OMEMO uses the Double Ratchet Algorithm "to provide multi-end to multi-end encryption, allowing messages to be synchronized securely across multiple clients, even if some of them are offline".[1] The name "OMEMO" is a recursive acronym for "OMEMO Multi-End Message and Object Encryption". It is an open standard based on the Double Ratchet Algorithm and the Personal Eventing Protocol (PEP, XEP-0163).[2] OMEMO offers future and forward secrecy and deniability with message synchronization and offline delivery.

Significance

Existing instant messaging encryption solutions like Off-the-Record Messaging (OTR messaging) are associated with long-standing criticism regarding missing integration with the underlying chat protocol. Developers of Empathy, the official messenger of the desktop environment GNOME, cited this as the reason for refusing to implement the much-requested[3] OTR messaging feature or any other end-to-end encryption scheme. Being integrated with the chat protocol, OMEMO improves on these solutions in that regard.[4][5]

OMEMO is also cited as bringing support for end-to-end encryption with multiple devices together with a decentralised (i.e. federated) messaging platform (XMPP).[6]

History

The protocol was developed and first implemented by Andreas Straub as a Google Summer of Code project in 2015. The project's goal was to implement a double-ratchet-based multi-end to multi-end encryption scheme into an Android XMPP-based instant messaging client called Conversations. It was introduced in Conversations and submitted to the XMPP Standards Foundation (XSF) as a proposed XMPP Extension Protocol (XEP) in the autumn of 2015.[1][7]

In October 2015, the ChatSecure project announced basing their encrypting messaging app onto the Conversations core and working on OMEMO support for an iOS version.[8]

A first experimental release of a OMEMO plugin for the cross-platform XMPP client Gajim was made available on December 26, 2015.[9]

Usage

References

  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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