| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a history information addition program adding history information to authority data in fraudulent determination based on the authority data during use of a credit card mainly, a fraudulent determination program using the history information added to the authority data, and a fraudulent determination system using the history information added to the authority data. <P>SOLUTION: To a record for storing the authority data, history information such as a difference of a time spent for use from that of the previous use in the authority data and a difference of a used amount is added. In the authority data for determining a fraudulent, it is determined whether the use is irregular or not from the history information in addition to determination from the authority data. When this is reflected on a score value, the highly reliable score value can be calculated. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
