| 摘要 |
<p>An IC card (13) internally stores two different PINs in a memory (77). Collation of these PINs performed at comparator (83) sets the IC card (13) having an internal data memory (82) in different characterizing statuses. When coincidence occurs at the first PIN collation, data input to the data memory (82) of the card (13) is permitted. When coincidence occurs at the second PIN collation, data transfer is permitted. Accordingly, when important data is stored in the IC card (13) and a plurality of persons handle the IC card, the data stored in the IC card (13) can be prevented from being altered unauthorized.</p> |
