Authentication enforcement using decryption and...

H - Electricity – 04 – L

Patent

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Details

H04L 9/32 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2359685

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.

La présente invention utilise un processeur protégé (22) fonctionnant avec un processeur central (210) pour mettre en oeuvre une opération unitaire de décryptage/authentification. Le processeur central (210) reçoit des message cryptés (12) qui comportent des informations d'authentification. Le processeur central doit soumettre chaque message (12) au processeur protégé (22). Le processeur protégé (22) décrypte et authentifie ensuite le message. Si l'opération d'authentification (24) a échoué, le processeur protégé (22) ne retourne pas le message entièrement décrypté au processeur central (210). Dans un mode de réalisation préféré, le processeur central (210) ne reçoit aucune partie du message en cas d'échec.

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