My understanding of curve25519 is that a key is derived solely from Alice's private key and Bob's public key and that curve25519 will always yield the same shared secret $K_s$ for the same keys. Now, ...
I need to generate a EDH group on the fly in one has not been specified in a config file. Diffie-Hellman is kind of expensive in terms of computation, so I'd like to reduce the cost if possible. Is ...