| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the illegal use of an information recording medium by storing data to the effect in the information recording medium when the data showing to the effect that it can not be used is not stored in the used information recording medium when its use is prohibited and also eliminating the identification data of an information medium recording processor. SOLUTION: The ID of an unusable train ticket is downloaded from a central device and is stored in unusable data storing parts 13b of each information medium recording processor main body. When a passenger carrying a card now tries to enter by using the main body and holds the card over the antenna part A of the main body, data is exchanged between the card and the main body. The CPU 11 of the main body decides that the train ticket ID of the card obtained by the data exchange coincides with the train ticket ID stored in the parts 13b. Then, data that defines the use of the card as disapproval is stored in the unusable data storing part m2 of the card. Then, the train ticket ID is eliminated from the parts 13b. |
