System and method for authorizing access to an article distribution or service acquisition machine

US4450535A · kind A · utility

Assignee

• Compagnie Internationale pour l'Informatique Cii-Honeywell Bull (Societe Anonyme) · FR

Inventors

• Bertrand J. C. H. de Pommery · La Roche-sur-Yon, FR
• Michel Ugon · Maurepas, FR

Key dates

• Filing date: Sep 15, 1981
• Grant date: May 22, 1984
• Expiry date: Sep 15, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F7/12
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

A system and method for distribution of articles or services, especially adapted to be secure against use by unauthorized personel, receives first and second data carriers. Each data carrier includes a processor, data storage, and interfacing circuits. A random number generator feeds a random number to each of the data carriers which use a program to generate a resultant based on the random number, a secret code and an identification number. The secret code and identification number are stored in the data storage of each data carrier. The resultants are compared to determine if they are equal, in which case access is allowed.