| 摘要 |
PROBLEM TO BE SOLVED: To provide a card authentication system capable of preventing the illegal use of a card due to forgery on a high level. SOLUTION: This card authentication system is provided with a plurality of card authenticating terminals 10 and a central data processing center 20 connected through a public communication network 30 to those card authenticating terminals so that on-line authentication processing can be executed by the card authenticating terminal 10 by performing access from the central data processing center 20 through a card business integral network system 50 to the respective host computers of card companies 51-53. This card authentication system is provided with a use validity/invalidity information storage device 40 for allowing each card user to preliminarily switch the validity/invalidity of the card, and the on-line authentication is executed only to the card whose use is judged to be valid through the use validity/invalidity storage device 40 by the central data processing center 20. |
