| 摘要 |
PROBLEM TO BE SOLVED: To actualize the state management of key data by increasing the memory use efficiency of the key data. SOLUTION: This IC card has a plurality of relative key data stored in the data area of a key data file containing key data. The relative key data are, for example, a read authority password, a write control, authority password, and an issuer authority password as passwords for file access control. Further, a ciphering key and a deciphering key or an internal authorization key and an external authorization key used for mutual authorization between different IC cards are also mutually relative key data. |
