Method and system for storing tickets on smart cards

US6119945A · kind A · utility

Assignee

• Koninklijke KPN N.V. · NL

Inventors

• Frank Muller · Feucht, DE
• Michel Marco Paul Drupsteen · Alkmaar, NL

Key dates

• Filing date: Aug 8, 1997
• Grant date: Sep 19, 2000
• Expiry date: Aug 8, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F17/0014
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In a smart card (1) electronic tickets (20) are securely stored. Ticket data is written into the fields (21, 22, 23) of a ticket (20) in a protected manner using a special code. Tickets (20) may comprise several fields, such as an entitlement field (21), a validation field (22), and a verification field (23). Different keys (K1, K2, K3) are used for each type of field at issuing, validation, and verification terminals (81, 82, 83). A further protection of the integrity of the tickets (20) is obtained by using a first storage command (UPDATE) to prepare a field when issuing the ticket (20) at the issuing terminal (81), and, a different, second storage command (WRITE) when validating the ticket (20) at the validation terminal (82). Thus, the fraudulent modification of an issued ticket (20) is prevented.