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...

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?