Patent ID: 8924738

Claim:
An information processing device, comprising: a content storage configured to store encrypted content; a key storage configured to store a key configured to decrypt the encrypted content stored in the content storage unit; a table storage configured to store a deletion table having information indicating whether the key stored in the key storage is to be deleted or to be maintained when a transition from an operating state of the information processing device to one of other states is made, where the information corresponds with the other states; and a processor configured to: decrypt the encrypted content stored in the content storage using the key stored in the key storage; check, when the transition from the operating state to one of the other states is made, the information in the deletion table, delete, during the transition, the key when the information in the deletion table indicates that the key is to be deleted, and maintain the key when the information indicates that the key is to be maintained; and acquire the key when the key is not stored in the key storage when the transition from the one of the other states to the operating state is made, and wherein power consumption of the information processing device in the one of other states is less than power consumption of the information processing device in the operating state.