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Dan Jones

@danwilshirejones.bsky.social

Reposted by Dan Jones

Security Cryptography Whatever @scwpod.bsky.social · 19/05/2025

NEW EPISODE! It seems like everyone that deploys E2EE encrypted cloud storage seems to mess it up, often in new and creative ways. Our special guests Matilda Backendal, Jonas Hofmann, & Kien Tuong Trong give us a tour & discuss how to actually build one securely: www.youtube.com/watch?v=sizL...

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Dan Jones @danwilshirejones.bsky.social · 08/05/2025

How does WhatsApp implement encrypted group chats? And are they secure? @malb.bsky.social, @bedow.bsky.social and myself were keen to figure this out. After two years of reverse-engineering, analysis and a few too many proofs, I presented our work at Eurocrypt earlier today. So, what did we learn?

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Formal Analysis of Multi-Device Group Messaging in WhatsApp

WhatsApp provides end-to-end encrypted messaging to over two billion users. However, due to a lack of public documentation and source code, the specific security guarantees it provides are unclear. Se...

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