A secure memory card with programmed controlled security...

G - Physics – 06 – K

Patent

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Details

G06K 19/073 (2006.01) G06F 12/14 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2158264

A secure memory card includes a microprocessor on a single semiconductor chip which interconnects through an internal bus to a number of non-volatile addressable memory chips (103a, 103b, ...103n). The microprocessor includes an addressable non-volatile memory for storing a number of key values. Each chip's memory (54) is organized into a number of blocks, each block including a number of rows of byte locations. Each row includes a lock bit location, the total number of which provide storage for a lock value. Each memory chip (103a, 103b, ...103n) is constructed to include security control logic circuits (30) arranged to perform a predetermined key validation operation by comparing key values against the bit contents of lock bit locations during an authentication procedure with a host computer.

Carte à mémoire sécurisée comprenant un microprocesseur monté sur une seule puce à semi-conducteur raccordée par un bus interne à un certain nombre de puces à mémoire adressables non volatiles (103a; 103b, ...103n). Le microprocesseur comprend une mémoire non volatile adressable stockant un certain nombre de valeurs de clé. La mémoire (54) de chaque puce est organisée en un certain nombre de blocks dont chacun comporte un certain nombre de rangées de positions d'octets. Chaque rangée comprend une position de bit de verrouillage dont le nombre total assure le stockage d'une valeur de verrouillage. Chacune des puces à mémoire (103a; 103b, ...103n) est pourvue de circuits logiques (30) de commande de sécurité adaptés pour exécuter une opération prédéterminée de validation de clé par comparaison des valeurs de clé avec les bits présents dans les positions de bits de verrouillage au cours d'une procédure d'authentification en association avec un ordinateur serveur.

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