AUTHENTICATION ENFORCEMENT USING DECRYPTION AND AUTHENTICATION IN A SINGLE TRANSACTION IN A SECURE MICROPROCESSOR

摘要

The present invention uses a secure processor (22) operating with a host processor (210) to perform a unitary decrypt/authenticate operation. The host processor (210) receives encrypted messages (12) that include authentication information. The host processor must submit each message (12) to the secure processor (22). The secure processor (22) then decrypts and authenticates the message. If the authentication operation (24) is not successful, the secure processor (22) does not return the fully-decrypted message back to the host (210). In a preferred embodiment, the host (210) will receive no part of the message upon failure.