Smart card reader with microcontroller and security component

G - Physics – 07 – F

Patent

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Details

G07F 7/10 (2006.01) G06K 7/00 (2006.01)

Patent

CA 2299173

The invention concerns smart card readers dedicated to a particular application and using both a microcontroller (MC) whereof the read-only memory determines the operation of the application, and a security component (CS) executing, under the microcontroller control, sub-programmes related to the application security (authentication, confidential programmes and the like). In order that the application manager may access certain zones of the security component memory, it is provided that the microcontroller can automatically shift into a so-called "transparent" mode, when a specific access code transmitted by the test card is recognised. In this mode, the reading or writing instructions of a memory zone of the security component, transmitted by the test card, are interpreted by the microcontroller as being reading or writing instructions of a memory zone of the security component and not of the microcontroller. The invention is applicable to portable readers.

L'invention concerne les lecteurs de carte à puce dédiés à une application particulière et utilisant à la fois un microcontrôleur (MC) dont la mémoire morte détermine le déroulement de l'application, et un composant de sécurité (CS) exécutant, sous le contrôle du microcontrôleur, des sous-programmes liés à la sécurité de l'application (authentification, programmes confidentiels, etc.). Pour que le gestionnaire de l'application puisse avoir accès à certaines zones de mémoire du composant de sécurité, on prévoit que le microcontrôleur peut passer automatiquement dans un mode dit "transparent", lors de la reconnaissance d'un code d'accès spécifique émis par une carte de test. Dans ce mode, les instructions de lecture ou écriture d'une zone de mémoire, émises par la carte de test, sont interprétées par le microcontrôleur comme étant des instructions de lecture ou écriture d'une zone de mémoire du composant de sécurité et non du microcontrôleur. Application aux lecteurs portables.

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