ChatSecure is a messaging application for iOS which allows OTR and OMEMO encryption for the XMPP protocol. ChatSecure is free and open source softwareavailable under the GNU General Public License . ChatSecure also features built-in support for anonymous communication on the Tor Network.

ChatSecure has been used by international individuals [4] [5] and governments, [6] businesses, [7] and those spreading jihadi propaganda. [8] [9]


ChatSecure was originally released in 2011 and was the first iOS application to support OTR messaging. In 2012 ChatSecure was a partnership with The Guardian Project and the Gibberbot app was rebranded to “ChatSecure Android”. [10]

In late 2016, the Android branding partnership was closed, [11] [12] with ChatSecure Android becoming ‘Zom’, [13] and ChatSecure iOS remaining as ChatSecure. ChatSecure iOS remains in active development and is unaffected by this change. Version 4.0 was released on January 17, 2017. [14]


In November 2014, “ChatSecure + Orbot ” received a perfect score on the Electronic Frontier Foundation’s Secure Messaging Scorecard; [15] the combination received HAVING point for encrypted communications in transit, HAVING communications encrypted with keys the provider does not-have access to ( end-to-end encryption ), making it feasible for users to verify indépendamment Their correspondents’ identities, HAVING past communications secure if the keys are stolen ( forward secrecy ), Having the code open to independent review ( open source ), Having the security design well-documented, and Having a recent independent security audit. [15]

See also

  • Comparison of instant messaging clients
  • List of free and open-source iOS applications


  1. Jump up^ “ChatSecure / ChatSecure-iOS” .
  2. Jump up^ “ChatSecure / ChatSecure-iOS” .
  3. Jump up^ “The ChatSecure translation project on Transifex” .
  4. Jump up^ Glaser, April. “Your Selfies Are Insecure. Here’s How to Encrypt Them” .
  5. Jump up^ Dredge, Stuart (December 11, 2014). “Worried about leaky cats? Messaging apps are responding with security features” – via The Guardian.
  6. Jump up^ Paletta, Damian (22 February 2016). “How the US Fights Encryption-and also Helps Develop It” – via Wall Street Journal.
  7. Jump up^ Pogue, David. “Your E-mail Password Will Never Be Safe” . 316 (1): 24-24. Doi : 10.1038 / scientificamerican0117-24 .
  8. Jump up^ “‘Dark net’ Islamic preachers under intelligence lens” .
  9. Jump up^ “ISIS recommends list of secure-messaging apps amid heated US encryption debate” .
  10. Jump up^ Nathan Freitas (24 October 2013). “ChatSecure v12 Provides Comprehensive Mobile Security and a Whole New Look” . . Retrieved 24 October 2013 .
  11. Jump up^ “The End of ChatSecure Android” .
  12. Jump up^ “ChatSecure 4.0 Launches With Support For Signal-Derivative ‘OMEMO’ Protocol (Update)” . 18 January 2017.
  13. Jump up^ “zom / Zom-Android” .
  14. Jump up^ “ChatSecure v4.0 – OMEMO and Signal Protocol” .
  15. ^ Jump up to:b “Secure Messaging Scorecard” . Electronic Frontier Foundation. 4 November 2014 . Retrieved 18 January 2017 .

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