公开(公告)号：EP1548732A2

公开(公告)日：2005-06-29

申请号：EP04257174.5

申请日：2004-11-19

申请人： SONY CORPORATION

发明人： Takashima, Yoshikazu Sony Corporation ,  Kitani, Satoshi Sony Corporation ,  Asano, Tomoyuki Sony Corporation ,  Ueda, Kenjiro Sony Corporation ,  Muramatsu, Katsumi Sony Corporation

IPC分类号： G11B20/00 ,  G11B20/10

CPC分类号： G11B20/00086 ,  G11B20/0021 ,  G11B20/00246 ,  G11B20/00304 ,  G11B20/00362 ,  G11B20/00405 ,  G11B20/00507

摘要： A content stored in an information recording medium is managed on a per unit basis and protected from unauthorized use. The content stored in the information recording medium is divided into units, and the content is encrypted with a unit key generated for each unit. A unit key generation key is generated based on a variety of key generation information. The unit key for each unit is generated by applying a record seed corresponding to each unit to the unit key generation key. For example, a block key is generated based on the unit key and a block seed per block unit set for every 3 sectors. An encryption process is performed on a per block unit basis using the block key. During decryption, the decrypting of the content is permitted conditional on the matching in the key generation information, the record seed, and the block seed stored in a disk. Unauthorized use of the content is thus prevented.

摘要翻译： 存储在信息记录介质中的内容以每单位为基础进行管理，并且防止未经授权的使用。 存储在信息记录介质中的内容被分成单位，并且使用为每个单元生成的单元密钥对内容进行加密。 基于各种密钥生成信息生成单位密钥生成密钥。 通过将与每个单元对应的记录种子应用于单元密钥生成密钥来生成每个单元的单位密钥。 例如，基于单位密钥生成块密钥，并且为每3个扇区设置块单元生成块种子。 使用块密钥以每块为单位进行加密处理。 在解密期间，允许内容的解密取决于密钥生成信息，记录种子和存储在盘中的块种子的匹配。 因此防止了未经授权使用内容。

公开(公告)号：EP1548732A3

公开(公告)日：2009-06-24

申请号：EP04257174.5

申请日：2004-11-19

申请人： Sony Corporation

发明人： Takashima, Yoshikazu Sony Corporation ,  Kitani, Satoshi Sony Corporation ,  Asano, Tomoyuki Sony Corporation ,  Ueda, Kenjiro Sony Corporation ,  Muramatsu, Katsumi Sony Corporation

IPC分类号： G11B20/00 ,  G11B20/10

CPC分类号： G11B20/00086 ,  G11B20/0021 ,  G11B20/00246 ,  G11B20/00304 ,  G11B20/00362 ,  G11B20/00405 ,  G11B20/00507

摘要： A content stored in an information recording medium is managed on a per unit basis and protected from unauthorized use. The content stored in the information recording medium is divided into units, and the content is encrypted with a unit key generated for each unit. A unit key generation key is generated based on a variety of key generation information. The unit key for each unit is generated by applying a record seed corresponding to each unit to the unit key generation key. For example, a block key is generated based on the unit key and a block seed per block unit set for every 3 sectors. An encryption process is performed on a per block unit basis using the block key. During decryption, the decrypting of the content is permitted conditional on the matching in the key generation information, the record seed, and the block seed stored in a disk. Unauthorized use of the content is thus prevented.