| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide key information to electronic money information charged between terminals so as to preclude beneficiaries from using the electronic money information, using an electronic money system having mobile terminal devices capable of sending and receiving electronic money information. <P>SOLUTION: The mobile terminal device 10 includes an electronic money information storage part 23 for storing electronic money information; a sending/receiving part 22 for sending or receiving the electronic money information to or from other mobile terminal device; an operation part 17 for inputting the amount of money sent to or received from the other mobile terminal device; and an electronic money information processing part 24 for subtracting or adding according to the inputted sum of money the inputted amount of money. When electronic money information is sent to the other mobile terminal device that is a beneficiary, the electronic money information processing part 24 creates key information (password or the like) for locking the electronic money information to preclude its use, and provides the electronic money information with the key information created. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
