| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new security technology to prevent the illegal use of a data carrier in an automatic vending machine for authenticating the data carrier. <P>SOLUTION: This automatic vending machine connected through a network 108 to a server 200 for performing merchandise selling by using a medium 104 is provided with a medium access part 114 for accepting the medium information of the medium 104 presented from a user 102, and for acquiring a medium identifier and sequence numbers included in the medium information, and for writing the sequence numbers in the medium 104, a sequence number generating part 132 for generating the next sequence numbers to be acquired by a predetermined function from the acquired sequence numbers, and for making the medium access part 114 write the sequence numbers in the medium 104, a communication part 116 for transmitting the medium identifier and the sequence numbers to the server 200, and for receiving the collation result of the sequence numbers of the medium 104 from the server 200 and an authentication result deciding part 136 for deciding whether to permit the use of the medium 104 from the collation result. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
