this post was submitted on 02 Nov 2023
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how does the server encrypt the message it sends without the secret? Or is that stored during sign up?
When you sign up, your device creates a public private key pair. It keeps the private key locally and sends the public key to the server. So instead of a username, you are nothing but a string of random characters representing your public key. You can see an example of this, if you go into the Linux terminal and type "ssh-keygen"
With public keys the attacker can encrypt the message for you, but only you can decrypt it, still.