| 摘要 |
In an apparatus which encrypts and records, or decrypts and reproduces content necessitated copyright protection using a plurality of encryption keys, the encryption key unique to a drive apparatus is stored into a memory in the apparatus at the time of manufacturing the apparatus. According to the present invention, the presence or absence of encryption key information in a recording apparatus, a reproducing apparatus, or a recording/reproducing apparatus can be easily confirmed When the encryption key unique to the drive apparatus is mounted, a flag indicating the presence of the encryption key is turned on. In other case, when receiving a command to confirm the presence of the encryption key from the outside of the apparatus, the flag which is turned on after confirming the presence of the encryption key by firmware of the apparatus is returned.
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