Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2002-01-11
2008-07-15
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S168000, C360S281000
Reexamination Certificate
active
07401231
ABSTRACT:
A system and method are realized which enables valid use of content by preventing unauthorized use of content which is caused by rewriting rights data. A structure is employed in which rights data including use-restriction information on content and DRM data including an encrypted content key are recorded in a digital data recording medium (media), and in which an integrity check value (ICV) for the DRM data can be stored in a recordable/playable area (protected area) by using only a dedicated IC. EKB distribution is used to execute the tree-structure key distribution to distribute keys for generating ICV-generation verifying keys. In this structure, unauthorized use of content by rewriting of the rights data is prevented.
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Asano Tomoyuki
Oishi Tateo
Osawa Yoshitomo
Taki Ryuta
Cervetti David García
Lerner David Littenberg Krumholz & Mentlik LLP
Moazzami Nasser
Sony Corporation
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