Comment on An analysis of X(Twitter)'s new XChat features shows that X can probably decrypt users' messages, as it holds users' private keys on its servers

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Lifter@discuss.tchncs.de ⁨2⁩ ⁨days⁩ ago

You probably didn’t understand me. I’m saying that a company can just arbitrarily decide (like you did) that the server is the “end” recipient (which I disagree with). That can be done for chat messages too.

You send the message “E2EE” to the server, to be stored there (like a file, unencrypted), so that the recipient(s) can - sometime in the future - fetch the message, which would be encrypted again, only during transport. This fully fits your definition for the cloud storage example.

By changing the recipient “end”, we can arbitrarily decode the message then.

I would argue that the cloud provider is not the recipient of files uploaded there. In the same way a chat message meant for someone else is not meant for the server to read, even if it happens to be stored there.

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