Re:A5/1 A5/2 (Score 1)

>>you have to register any encryption/decryption with the NSA, you will never really be safe from them if it's a purely US product I wonder how this could work if you used ephemeral elliptic curve private keys with Diffe-Helman. For each conversation, a new random private key is generated. The corresponding EC public key is sent to the other party and a shared secret can be computed. This is can be used as a key and IV for AES. Note that new tandom keys could be generated automatically at random short intervals in your converstaion to reduce the amount of cyphered information available for brute force decryption. The registration of the method is easy, but the registration of the keys almost impossible.