encrypted IP

Does anybody have an update on the crypto IP efforts? I've heard there are several commercial products, including weakened U.S. DES versions from Semaphore Technologies, Motorola, Hughes, and UUNET technologies. Also, some higher quality foreign versions. How many of these products interoperate across vendors? Are there any public domain versions available or in the works? Any emerging standards, so that if I wrote my own system it could interoperate with other crypto IP based clients and servers? thanks, Jim Hart hart@chaos.bsu.edu