Method and device for data communication

H - Electricity – 04 – L

Patent

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Details

H04L 9/32 (2006.01) G06K 19/077 (2006.01) G07F 7/10 (2006.01) H04L 9/08 (2006.01)

Patent

CA 2241834

A method and a system for use for safe data transfer between a terminal which is controlled by an IC card (1), and a central unit (3), such as a central computer in a bank. The IC card (1) comprises card-specific program information which is used to control the interaction of the card with the terminal (2) in connection with adopting a safe system mode, and card-specific secret information which is used to cryptographically protect data transfers between the terminal (2) and the central unit (3) in a safe system mode. The card specific secret information is stored in such a manner that no read-out of it can be made from the card. The card-specific program information is transferred from the card to the terminal for the purpose of said control.

L'invention concerne un procédé et un système permettant un transfert de données en mode protégé entre un terminal commandé par une carte à circuit intégré (1) et une unité centrale (3), par exemple un ordinateur central dans une banque. La carte à circuit intégré (1) comprend une information de programme spécifique de la carte qui est utilisée pour la commade de l'interaction de la carte avec le terminal (2) en mode protégé et une information secrète spécifique de la carte qui est utilisée pour protéger par un cryptage des transferts de données en mode protégé entre le terminal (2) et l'unité centrale (3). L'information secrète spécifique de la carte est enregistrée de manière à ce qu'elle ne puisse pas être lue à partir de la carte. L'information de programme spécifique de la carte est transférée de la carte au terminal pour effectuer ladite commande.

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