  General cryptographic schemes are presented where keys can be one-time or
ephemeral. Processes for key exchange are derived. Public key cryptographic
schemes based on the new systems are easily established. Authentication and
signature schemes are implemented. The schemes are an advance on group ring
techniques and are easily implemented but highly secure. They may be integrated
with error-correcting coding schemes so that encryption/coding and
decryption/decoding may be done simultaneously.
