| 摘要 |
PROBLEM TO BE SOLVED: To improve security.SOLUTION: A secure storage medium 12 includes a memory 13 and a controller 14. The memory 13 includes a protected first memory region 13f which stores concealed information transmitted from a host device 11, and a second storage region 13g for storing encrypted contents. The controller 14 performs authentication for accessing the first storage region 13f. A non-secure storage medium 30 includes a third memory region for storing the encrypted contents. The host device 11 and the secure storage medium 12 generate a bus key, which is common only to the host device and the secure storage medium by authentication and is used for encryption in transmitting/receiving information in the first storage region between the host device and the secure storage medium. |
