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martinralbrecht
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I am a professor in the Information Security Group at Royal Holloway, University of London. I work on cryptography and computational mathematics.
This account is a replica from Hacker News. Its author can't see your replies. If you find this service useful, please consider supporting us via our Patreon.
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WhatsApp's end-to-end encryption has been independently investigated: https://kclpure.kcl.ac.uk/ws/files/324396471/whatsapp.pdf
Full version here: https://eprint.iacr.org/2025/794.pdf
We didn't review the entire source code, only the cryptographic core. That said, the main issue we found was that the WhatsApp servers ultimately decide who is and isn't in a particular chat. Dan Goodin wrote about it here: https://arstechnica.com/security/2025/05/whatsapp-provides-n...