Value transfer system

G - Physics – 07 – F

Patent

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Details

G07F 7/10 (2006.01) G07F 7/08 (2006.01)

Patent

CA 2225936

A value transfer system using integrated circuit cards for exchanging electronic cash in off-line transactions employs crytographically secure message protocols. Cards are loaded each with two schemes from a series and interactions between cards determines and uses the older scheme shared by the cards, causing one card to switch schemes irrevocably if that common scheme is its second scheme. In this way a switch to a new scheme can migrate through the system.

Un système de transfert de valeurs mettant en oeuvre des cartes à circuit imprimé pour des échanges de caisse électronique dans des transactions en différé utilise des protocoles de message cryptographique de toute sécurité. Chaque carte est chargée avec deux logiques d'une série et l'interaction se faisant entre les cartes définit la logique la plus ancienne partagée par les cartes et l'utilise, ce qui amène une carte à connecter des logiques de façon irrévocable si cette logique commune est sa seconde logique. De cette manière, un basculement sur une nouvelle logique permet de migrer à travers le système.

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