this post was submitted on 29 Nov 2023
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Privacy
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The contents of the chat messages are e2e encrypted, so meta can't see what you are sending.
But they can see all of the Meta data, ie how often you chat with someone, how often you send pictures/videos/voice messages, etc.
That is more than enough to know everything about you and your friends.
Even if we assume correct e2ee is used (which we have no way of knowing), Meta can still see what you are sending and receiving, because they control the endpoints. It's their app, after all.
They use the Signal protocol for e2ee.
Or so they claim. We can't really verify their implementation though.
Even if they do, you can't know whether they can access the encryption keys. It's all just layers of "but this, but that" and at the very bottom a layer of "trust me, bro".