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Elon's Encrypted DMs with Matthew Garrett
Security Cryptography Whatever
How to Use Triple Diffie-Hellman to Authenticate Key Exchange
Triple Diffie-Hellman would matter if there was a notion of cryptographic identity that you were trying to work with. The sender is generating a femoral key, like they're just coming up with a key on the fly and they're using that to encrypt to the public key of the receiver. Every device generates a public keypad using the NIST P256 curves.
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