| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of information reproduction by enabling limit information reproduction of storage media, even when use conditions of information reproducing equipment, for instance, use areas are changed. SOLUTION: An equipment identification code of the information reproducing equipment and a media identification code of a memory card 10 respectively consist of a fixed code and an area code, and the area code of the equipment identification code between them is updated, on the basis of position information acquired from a mobile communication network. In the case of performing mutual authentication control between the information reproducing equipment and the memory card 10, the equipment identification code including the area code to be updated and the media identification code are used, so as to conduct authentication processing. |
