VALIDITY VERIFICATION METHOD OF DATA WRITTEN IN IC CARD, AND PROGRAM FOR IC CARD

摘要

PROBLEM TO BE SOLVED: To provide a validity verification method of data, in which an IC card issuance system verifies the validity of the data written in an IC card.;SOLUTION: The IC card transmits an authentication code "_C", calculated based on all the pieces of data written in a memory to a request from the IC card issuing system (S130). The IC card issuing system calculates an authentication code "_P", using the same operational expression as the IC card, based on all the pieces of written data transmitted to the IC card (S140). The IC card issuing system verifies the validity of the data written in the IC card by comparing the authentication code "_C" with the authentication code "_P" (S150).;COPYRIGHT: (C)2005,JPO&NCIPI