Process for protection against fraudulent use of smart cards, and device for use of the process

US5162638A · kind A · utility

Assignee

• Laboratoire Europeen de Recherches Electroniques Avancees Societe en nom Collectif · FR

Inventors

• Eric Diehl · Betton, FR
• Joel Hamon · Lipsheim, FR
• Michel Leduc · Bœrsch, FR

Key dates

• Filing date: Oct 31, 1990
• Grant date: Nov 10, 1992
• Expiry date: Oct 31, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F7/125
• WIPO field: Control
• WIPO sector: Instruments

Abstract

To prevent a person having found or stolen a card of a pay-television subscriber from using it fraudulently, the identity of the subscriber is recorded in a zone protected from reading and writing. At the beginning of the period of use of a new card, the new card compares the identity of the new card with that of the old one, and delivers the password only if the two identities are the same.