From: George A. Gleason
Voice: yeah, it's a pain in the tail. One thing I thought might be interesting is to use two digitisers: one for the voice input, another for a keystream which is derived from a radio or TV program signal which can be picked up simultaneously by both correspondents. XOR the two streams together and then do whatever you have to do to make the encrypted results transmissable.
Its so simple to just built fully digital systems that use real public key encryption, I don't see why anyone would want to use something like you are proposing. Your system would provide virtually no real security. I really suggest that anyone who is serious about doing this stuff read unabridged (hardcover only) version of "The Codebreakers" by Kahn. He gets into lots of historical examples of how stupidly designed cryptosystems have cost people their lives. Ususally, people have very poor ideas of what is and isn't secure. I suggest that some historical perspective may give people more respect for how hard it is to do this stuff right. Perry