Method for managing an application program loaded into a...

G - Physics – 06 – K

Patent

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G06K 19/073 (2006.01) G06F 21/00 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2051365

Pour sécuriser l'utilisation des cartes à puce, on provoque l'exécution par le microprocesseur (3) de ces cartes, au moment de l'utilisation, du calcul (11) d'une signature selon un algorithme de chiffrement complexe prenant en compte d'une part un code secret (10) propre à la carte et d'autre part des instructions (12) propres au programme. On compare la signature ainsi calculée à une signature (14) préenregistrée dans la carte dans les mêmes conditions au moment de sa livraison par l'émetteur de la carte. On montre qu'il est possible d'autoriser plusieurs utilisations sans porter atteinte à la sécurité de celles-ci.

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