A personal computer PC (10) transmits encrypted user information and encrypted license information in a secure recording medium (MA) to a server (20). The server decrypts the encrypted license information and obtains the license information. After this, the server erases the encrypted license information in the secure recording medium (MA) via the personal computer PC. The server decrypts the encrypted user information in the secure recording medium (MB) and obtains the user information. After this, according to the user information, the server encrypts the license information and writes the encrypted license information obtained into the secure recording medium (MB) via the personal computer PC. Thus, it is possible to move the license information between the two secure media, thereby improving the convenience.