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    • 79. 发明申请
    • INFORMATION PROCESSING APPARATUS, INFORMATION RECORDING MEDIUM, INFORMATION PROCESSING METHOD, AND COMPUTER PROGRAM
    • 信息处理装置,信息记录介质,信息处理方法和计算机程序
    • US20070194117A1
    • 2007-08-23
    • US11279531
    • 2006-04-12
    • Yoshikazu TakashimaKenjiro Ueda
    • Yoshikazu TakashimaKenjiro Ueda
    • G06K7/10
    • H04L9/0891G11B20/00086G11B20/0021G11B20/00362G11B20/00492G11B2020/10833H04L9/0869H04L2209/60H04N21/4408
    • An information processing apparatus for recording information on an information recording medium is provided. The information processing apparatus includes a content cryptographic processor configured to generate encrypted content by executing encryption using a unit key associated with a content management unit that serves as a unit for controlling usage of content; a unit-key-file processor configured to generate a unit key file storing the unit key, and to encrypt the unit key file or constituent data of the unit key file using an encryption key that is generated using a seed whose value is updated in accordance with change in constituent data of unit keys included in the unit key file; and a data recorder configured to record the content management unit including the encrypted content as constituent data and the unit key file on the information recording medium according to a predetermined data recording format.
    • 提供了一种用于在信息记录介质上记录信息的信息处理设备。 信息处理装置包括:内容密码处理器,被配置为通过使用与作为用于控制内容的使用的单元的内容管理单元相关联的单元密钥执行加密来生成加密内容; 配置为生成存储单位密钥的单位密钥文件的单元密钥文件处理器,并且使用使用根据其更新其值的种子生成的加密密钥对单位密钥文件的单位密钥文件或构成数据进行加密 改变包含在单位密钥文件中的单位密钥的构成数据; 以及数据记录器,被配置为根据预定数据记录格式将包括加密内容的内容管理单元作为组成数据和单元密钥文件记录在信息记录介质上。