G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 7/007 (2006.01) G11B 7/004 (2006.01) G11B 7/0045 (2006.01) G11B 7/005 (2006.01) G11B 19/28 (2006.01) G11B 20/00 (2006.01) G11B 20/10 (2006.01)
Patent
CA 2420221
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.
L'invention porte sur un disque optique (1, 4) pour données cryptées comportant une première zone d'enregistrement (3b, 4b) où sont enregistrées des données cryptées, et une deuxième zone d'enregistrement (3a, 4a) comprenant une première partie (6) lue avant la première zone d'enregistrement (3b, 4b) et contenant les codes de décryptage des données cryptées, et une deuxième partie (7) contenant des données d'identification du support d'enregistrement modulées par une méthode de modulation différente au moins de celle de la première zone d'enregistrement.
Kazami Shinichi
Kihara Takashi
Sako Yoichiro
Gowling Lafleur Henderson Llp
Sony Corporation
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