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Does MATRIX recipients know my IP?
(lemmy.ml)
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this post was submitted on 23 Jun 2024
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Privacy
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Can you show me the part of the spec that allows a server with no room members to get private room info from another server? I'm skeptical, but if true, I believe that would be worth reporting as a bug.
You're funny.
Obviously you need someone joining the room for the room metadata to be shared between homeservers. But that is really only a minor barrier and once that has happened the worst case scenario takes place immediately. On other messengers (federated or not) a newly joining member has very limited access to past room metadata. Not so with Matrix, where a joining homeserver get full retroactive access to all the room metadata since the room's creation. If you can't see the problem with that, you really need to stop privacy LARPing 🙄
Well then, your assertion that Matrix gives it freely is false.
This is false, too. Historical event visibility is controlled by a room setting. (And if you don't trust admins of a sensitive room to configure for privacy, then you're going to have bigger problems, no matter what platform it's on.)
Edit: I suppose you might argue that you can bypass this by running your own homeserver and attempting to join the room from it, thereby granting visibility not through joining (as you wrote), but instead through federation with the server you control. The thing is, you can't do it without permission. Room admins can simply deny your join request when they see what server you're on. This might make sense in a particularly sensitive room, for example, just as it would to restrict history visibility.
LARPing? I'm not the one stirring up drama with falsehoods and patronizing snark, am I? Farewell.
My point is that it should never give out that data, or even store it permanently in the first place. This is just a fundamentally bad design from a privacy perspective, and other messengers don't do that.
This is not false, what you mean only hides it for normal users, but it still ends up in the database of all participating homeservers and all the admins of those have full access to it. I happen to run a Matrix homeserver myself...