| 摘要 |
<p>An optical disc (1, 4) on which encrypted data is recorded. The optical disc includes a first recording area (3b, 4b) where encrypted content data is recorded and a second recording area (3a, 4a) having a first area portion (6) provided in a position from which data is read out prior to the read from the first recording area, for recording encryption key data for decrypting the encrypted data and a second area portion (7) for recording identification data for identifying a recording medium which has been modulated by a modulation method different at least from the first area portion.</p> |
