Process for exchange of rights between microprocessor cards

US5247578A · kind A · utility

Assignee

• France Telecom Etablissement Autonome de Droit Public (Centre National d'Etudes des Telecommunications) · FR

Inventors

• Jean-Claude Pailles · Épron, FR
• Patrick Remery · Caen, FR
• Francoise Vallee · Lantheuil, FR

Key dates

• Filing date: Jan 22, 1992
• Grant date: Sep 21, 1993
• Expiry date: Jan 22, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q20/40975
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

A process for exchange of rights between microprocessor cards, wherein multiple keys (K1, K2, . . . ) and varied keys (Ka5, Kb3) are used. A card to be debited calculates a voucher with varied key (Ka5) that the card to be credited reconstitutes. The process has application to electronic payment.