The Guardian’s espionage-style self-destruct secure messaging tech explained
By Tony Bosworth in Media News on Friday, 04th July 2025 at 10:49am
Guardian software engineer Sam Cutler.
The Guardian has rolled out new secure messaging technology which allows sources to anonymously contact journalists.
Secure Messaging uses espionage-style techniques to conceal and encrypt messaging sent by sources to journalists within The Guardian app.
Messages are so secret that only the journalists themselves have a decryption key to view them before they self-destruct, disappearing after 14 days.
The technology, which was developed in partnership with the University of Cambridge, is open source which means it can be adopted by any other newsroom.
This morning, Will Dean, The Guardian’s global supporters editor, shared his interview with Guardian software engineer Sam Cutler, who works as part of the outlet’s investigations unit, ab...
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