Non-contact type ic card

H - Electricity – 04 – B

Patent

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Details

H04B 5/02 (2006.01) G06K 19/073 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2277905

A memory (1) in a non contact type IC card (100) includes a data protection region (B2) storing data requiring security and an region (B1) stoizng other data. A main control circuit (2) generates data to be stored and designates a location for data storage in the region (B1) or the data protection region (B2) according to a content of the data. An address non selecting circuit (4) selects whether the generated data is to be written into the location in the data protection region (B2) designated by the main control circuit (2) according to a state of a state setting circuit (3).

Une mémoire (1) dans une carte à circuit intégré sans contact (100) comporte, d'une part, une zone de protection des données (B2) servant au stockage de données exigeant un maintien du secret et, d'autre part, une zone (B1) destinée au stockage d'autres données. Un circuit principal de commande (2) produit des données à stocker et indique la position de la zone (B1) servant au stockage de données ou de la zone (B2) de protection des données et ce, en fonction du contenu des données. Un circuit d'adresses non sélectif (4) décide d'écrire ou non les données produites sur la position de la zone de protection des données (B2) indiquée par le circuit principal de commande (2) et ce, en fonction de l'état d'un circuit d'établissement d'état (3).

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