| 摘要 |
<p>In the case of an IC card having a decoding key for decoding data and an encoding key for encoding the data which are generated inside or set by an external unit, when a key takeout instruction for taking out the decoding key and encoding key in the IC card to an external unit is input, the decoding key and encoding key are encoded by a plurality of other keys set in the IC card and then transmitted to an external unit. <IMAGE></p> |
