Re: fast des

Run your plaintext through compress first; remove the compress header; then encrypt. Compression will screw up character frequencies (and use all eight bits) enough to make automated detection of a successfully-broken encryption really darn hard. Especially if you keep changing compression technology each message.

Most encryption scheams use cypher block chaining or some other mechanism where a change in one block will affect every block to come after it, no? Given this, would inserting a block of random data at the begining of the datastream help? brad