Method and apparatus for computer memory protection and...

G - Physics – 06 – F

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G06F 21/00 (2006.01) G07F 17/32 (2006.01) G07F 19/00 (2006.01)

Patent

CA 2406053

A method and apparatus are provided for computer memory protection and verification. In one example, the apparatus is a secure memory device (SMD) (22) including means to independently read a program memory device (30) and compute and store a signature or other means of verification of binary content of the program memory device, means to compare binary program memory content to binary program memory content stored in the program memory device, and means to disable reading and writing of the program memory device if predetermined conditions do not occur. A previously stored signature of program memory content may be used as means of verification of previous program memory content. A secure memory device may be constructed as a single securely enclosed unit that is tamperproof and that has electrical connections available only for the purpose of connection with an apparatus that accepts a program memory.

La présente invention concerne un procédé et un appareil permettant de protéger et de vérifier une mémoire informatique. Dans un exemple, cet appareil est un dispositif de mémoire protégée (22) comprenant un organe permettant de lire indépendamment un dispositif de mémoire de programme (30) et de traiter et stocker une signature ou un autre organe de vérification de contenu binaire du dispositif de mémoire de programme, un organe permettant de comparer un contenu binaire de programme binaire au contenu de mémoire de programme binaire stocké dans le dispositif de mémoire de programme, et un organe permettant de désactiver la lecture et l'écriture du dispositif de mémoire de programme si des conditions prédéterminées ne se réalisent pas. On peut utiliser une signature de contenu de mémoire de programme préalablement stockée comme moyen de vérification du contenu de mémoire de programme précédent. On peut élaborer un dispositif de mémoire protégé sous forme d'unité unique confinée en sécurité, qui est inviolable et qui possède des connexions électriques valables uniquement pour une connexion avec un appareil acceptant une mémoire de programme.

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