Semiconductor memory card and data reading apparatus

G - Physics – 11 – C

Patent

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Details

G11C 16/22 (2006.01) G06F 12/14 (2006.01) H04L 9/32 (2006.01)

Patent

CA 2336158

A semiconductor memory card comprising a control IC (302), a flash memory (303), and a ROM (304). The ROM (304) holds information such as a medium ID (341) unique to the semiconductor memory card. The flash memory (303) includes an authentication memory (332) and a non-authentication memory (331). The authentication memory (332) can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory 331 can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC (302) includes control units (325) and (326), an authentication unit (321) and the like. The control units (325) and (326) control accesses to the authentication memory (332) and the non-authentication memory (331), respectively. The authentication unit (321) executes a mutual authentication with an external device.

Cette carte mémoire à semi-conducteur comprend un circuit imprimé de commande (302), une mémoire flash (303) et une mémoire ROM (304), cette dernière contenant des informations telles qu'une identification de support (341), caractéristique unique appartenant à cette carte mémoire. La mémoire flash (303) comprend une mémoire d'authentification (332) et une mémoire de non-authentification (331). Il est possible d'accéder à la mémoire d'authentification (332) uniquement au moyen de dispositifs extérieurs authentifiés de manière affirmative et il est possible d'accéder à la mémoire de non-authentification (331) au moyen de dispositifs extérieurs que ceux-ci aient été ou non authentifiés de façon affirmative. Le circuit intégré de commande (302) comporte des unités de commande (325 et 326), une unité d'authentification (321) et analogue. Les unités de commande (325 et 326) commandent respectivement l'accès à la mémoire d'authentification (332) et celui à la mémoire de non authentification (331). L'unité d'authentification (321) exécute une authentification mutuelle à l'aide d'un dispositif extérieur.

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