Since they haven't come up yet, and since the website obviously contains primarily marketing content, here are a few relevant links that might be of interest to

Since they haven't come up yet, and since the website obviously contains primarily marketing content, here are a few relevant links that might be of interest to the HN crowd: - Cryptography whitepaper: https://threema.ch/press-files/2_documentation/cryptography_whitepaper.pdf https://threema.ch/press-files/2_documentation/cryptography_... Covers the technical aspects. - Transparency report: https://threema.ch/en/transparencyreport https://threema.ch/en/transparencyreport Covers the legal aspects. - Reverse engineering of the protocol (33c3): https://media.ccc.de/v/33c3-8062-a_look_into_the_mobile_messaging_black_box https://media.ccc.de/v/33c3-8062-a_look_into_the_mobile_mess... - Third party open source re-implementation of Threema for the desktop (Qt): https://openmittsu.de/ https://openmittsu.de/ - Source code of the web application: https://github.com/threema-ch/threema-web/ https://github.com/threema-ch/threema-web/ - Protocol developed to enable trustless WebRTC signaling between app and browser: https://saltyrtc.org/ https://saltyrtc.org/ Obligatory disclaimer: I'm working for Threema as a developer.