SYSTEM AND METHOD OF MESSAGE AUTHENTICATION

摘要

A system and method of improving the resistance of MAC functions to attack makes use of the output MAC value to perform a one-way operation such as exponentiation in a cyclic group such as a Galois Field. Further enhancements are provided by an optional keyed function that can provide another barrier through which an attacker must break. The application of a keyed function can also be applied to hashing functions so that they have the qualities of a MAC function and additionally benefit from the application of the one way operations to improve security.