Patent ID: 8307448

Claim:
A storage device storing broadcasting data in a removable hard disk having a tamper resistant module (TRM) region, comprising: a processor which receives broadcasting data that includes copy control information, the copy control information limits the storage period of the broadcasting data, wherein the receiving section extracts the copy control information from the broadcasting data while the broadcasting data is in the unencrypted state; the processor encrypts the broadcasting data whose storage period is limited; and the processor stores the encrypted broadcasting data in the removable hard disk, wherein the processor generates license information including both decryption information required to decrypt the encrypted broadcasting data and expiration date information for limiting storage period of the encrypted broadcasting data in accordance with the copy control information and stores the generated license information in the TRM region of the removable hard disk before storing the encrypted broadcasting data in the removable hard disk, and wherein the processor updates the expiration date information stored in the TRM region of the removable hard disk while the processor stores encrypted broadcasting data in the removable hard disk.