This whole thing seems crazier each time I think about it. basically my question is: given that he picks his key securly does he have an OTP if the plaintext is shorter than the key? Bob
Yes, if he were just to modular add the key to the plaintext (or XOR them) he would have an OTP if AND ONLY IF the key were real random, however, he doesn`t do this, he uses the key to seed an array or linear congruential generators, which have been cryptanalysed to hell and back. Basically, ALWAYS, and I mean ALWAYS dismiss anyone trying to sell an OTP, they are totally impractical, he`s just using technobabble to get around the fact that his system is actually a stream cipher and is of no value because it has been broken within days of being announced. Datacomms Technologies web authoring and data security Paul Bradley, Paul@fatmans.demon.co.uk Paul@crypto.uk.eu.org, Paul@cryptography.uk.eu.org Http://www.cryptography.home.ml.org/ Email for PGP public key, ID: 5BBFAEB1 "Don`t forget to mount a scratch monkey"