| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide safe utilization by preventing illegally copied products from being utilized. <P>SOLUTION: A readable and writable storage device is mounted on a liquidation card, a prepaid card, a computer, or a mobile communication terminal, and information in the storage device is updated at each time of use or at intervals of a certain use time or a certain frequency in use, and a center recognizes the latest information by a database. Information, transmitted to the center at the time of use and information which is recognized by the center and should be transmitted essentially, are collated. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
