| 摘要 |
PURPOSE:To easily execute the increase and change of a discrimination code, and to raise the security property of the discrimination code, by providing a storage means for storing the discrimination code of an IC card, and writing a telegraphic message transmitted from a host computer, in the storage mans, when it is discriminated that said telegraphic message is a telegraphic message for instructing to set the discrimination code. CONSTITUTION:When a customer inserts his on IC card 1 into an ATM 2, the CPU of the IC card 1 compares a memory 10b with the PIN code of a memory 22 of the ATM 2, and its result is given to the ATM 2. If a transaction processing can be executed, the ATM 2 executes the transmission of a data required for a host computer, and when a data for showing the result of transaction from the host computer 3 is received, the CPU of the IC card 1 writes its transaction result data in the memory 10b. When a telegraphic message is received from the center 3, the CPU 20 of the ATM 2 discriminates whether its telegraphic message instructs down-line loading of the PIN code or not, and stores the transmitted PIN code by designating a dead area. |
