| 摘要 |
PURPOSE: To make it difficult for a third person to acquire individual information illicitly, in a process until the provider of service certifying the user. CONSTITUTION: In the certification system where a card 10 and a host computer 20 are connected to each other by connection line 30, the card 10 is equipped with a memory 11 for ID which stores a card ID, an input part 12 where the input of a secrete 10. No., etc. are performed, an interface 13 on card side which is connected with a host computer 20, an information coder 14, which generates information for certification by mixing random numbers being sent from the host computer 20 and having peculiar values each time they are sent and the secrete IC. No. of that card prior to coding, and a temporary storage 15, which temporarily stores the information for certification obtained by the information coder 14.
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