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Is Telegram really an encrypted messaging app? (blog.cryptographyengineering.com)

submitted 2 months ago by solrize@lemmy.world to c/privacy@lemmy.ml

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Blog post by crypto professor Matthew Green, discussing what Telegram does (I wasn't familiar with it) and criticizing its cryptography. He says Telegram by default is not end-to-end encrypted. It does have an end-to-end "secret chat" feature, but it's a nuisance to activate and only works for two-person chats (not groups) where both people are online when the chat starts.

It still isn't clear to me why Telegram's founder was arrested. Green expresses some concern over that but doesn't give any details that weren't in the headlines.

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[-] adespoton@lemmy.ca 2 points 2 months ago

The CA is purely a way to provide validation that the endpoints being connected are who they say they are; the actual signing certificates are still private. Apple uses a central directory; Signal depends on certificates linked to one way hashes of phone numbers.

this post was submitted on 25 Aug 2024

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