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

ChatSecure logo, full.
Original author(s) Chris Ballinger
Developer(s) Chris Ballinger, David Chiles, and contributors
Initial release 1.0.2 / February 27, 2012; 6 years ago (2012-02-27) [1]
Stable release
4.2.0 / October 24, 2017; 10 months ago (2017-10-24) [2]
Written in Objective-C, Swift
Operating system iOS
Size 77.7 MB
Available in Many [3][vague]
Type Communication
License GNU General Public License

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 formed a partnership with The Guardian Project and the Gibberbot app was rebranded to "ChatSecure Android".[10]

In late 2016, the Android branding partnership was ended,[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 points for having communications encrypted in transit, having communications encrypted with keys the provider doesn't have access to (end-to-end encryption), making it possible for users to independently verify 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 designs well-documented, and having a recent independent security audit.[15]

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