Method of managing copy protection information of a...

G - Physics – 11 – B

Patent

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G11B 20/10 (2006.01) G11B 20/00 (2006.01)

Patent

CA 2487408

The present invention relates to a method of managing CPI (Copy Protection Information) for preventing unauthorized copy of encrypted content recorded on a high-density recording medium such as a BD-ROM (Blu-ray Disc ROM). In the present method, when main content data is recorded in encrypted manner, CPI that is necessary to decrypt the encrypted main content data is written in a predetermined PIC area and is also copied at least once in an area other than the PIC area.

L'invention concerne un procédé permettant de gérer des informations de protection contre la copie (CPI) pour empêcher une copie non autorisée d'un contenu crypté qui est enregistré sur un support d'enregistrement haute densité tel qu'un BD-ROM (disque Blu-ray à mémoire morte). Selon ledit procédé, des données de contenu principales sont enregistrées de manière cryptée, et les CPI nécessaires au décryptage de ces données de contenu principales cryptées sont écrites dans une zone de données de commande et d'informations permanentes (PIC) et sont en outre copiées, au moins une fois, dans une zone autre que la zone PIC.

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