Proposal for identity-based key distribution systems

Key distribution systems based on identification information are presented. The systems are analogous to the Diffie-Hellman public key distribution systems in which the former use each user´s identification information instead of public files used in the latter. The systems do not require centres to distribute work keys or users to keep directories of key-encrypting keys. Therefore, key management in cryptosystems can be simplified by the identity-based key distribution systems.