| 摘要 |
PURPOSE:To modify answer-to-reset data after a card is issued by reading answer-to-reset data in a 1st or 2nd storage means according an flag for a 3rd storage means exists or not. CONSTITUTION:Before the card is issued, answer-to-reset data written in a fixed answer-to-reset storage part 12 in a card producing step is read and used After issuing the card, answer-to-reset data, which is written in a rewritable data memory at the time of issuing the card, is read and used. Thus, by modifying the contents stored in a data memory 29, the answer two reset data can be modified even at the end of issuing the card. If the complimentary byte of the answer-to-reset data is modified, it is feasible. |
