| 摘要 |
<p>PURPOSE:To develop high security effect and to increase an access speed by mounting an IC chip, wherein a signal transmitting/receiving exclusive circuit and a memory capable of writing read/write possible and impossible password function and data memory function at the time of the publishment of a card are fused, in the board of the card. CONSTITUTION:A single IC chip wherein a gate array 2 becoming a data signal transmitting/receiving exclusive circuit and a memory 3 are fused is mounted in the card board 1 of an IC card and sheet-like electromagnetic coils (4A) - (4D) mutually transmitting a data signal between a reader/writer and said coils through electromagnetic force are mounted in said card board 1. A white card 1A is formed at the time of manufacturing and the writing of a password for recovering password function, the allotment of a function password and the allotment of the memory at every function are performed in a card publishing stage and the writing of the function password is performed. The card 1 is inserted in the reader/writer to give the function password and, when said password coincides with the written function password, the reading/ writing of the allotted memory is performed. In case of non-coincidence, the number of errors is counted and, when the count value exceeds a set value, read/write becomes impossible.</p> |
