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1. 发明公开

KR1020050122174A 정보 기록 매체 드라이브 장치 无效
标题翻译：信息记录介质驱动装置
公开(公告)号：KR1020050122174A
公开(公告)日：2005-12-28
申请号：KR1020047020071
申请日：2004-04-05
申请人： 소니 주식회사
发明人： 기따니,사또시 , 요네미쯔,준 , 무라마쯔,가쯔미 , 아사노,도모유끼 , 다까시마,요시까즈
IPC分类号： G11B20/10 , H04L9/08
CPC分类号： G11B20/00086 , G11B20/00115 , G11B20/0021 , G11B20/00528 , H04L9/0631 , H04L9/0869 , H04L2209/60
摘要： There is provided a configuration capable of effectively preventing unauthorized use of an encrypted content stored in an information recording medium. Seed information (seed 2) required for generating a block key applied to decryption of the encrypted content is encrypted by a block key (Kb1) and stored. Furthermore, in the configuration requiring transfer of the seed information (seed 2) between devices, both of the seed information (seed 2) and a recording key (K2) are encrypted by a session key before transmission/reception. With this configuration, it becomes difficult to analyze the seed information (seed 2) by data acquisition from the information recording medium and the data transfer path. Thus, it is possible to realize a content protection of a high security level by increasing the difficulty of analysis of key information generated by using the seed information and analysis of the encryption algorithm.
摘要翻译：提供能够有效地防止未经授权使用存储在信息记录介质中的加密内容的配置。用于生成应用于加密内容的解密的块密钥所需的种子信息（种子2）通过块密钥（Kb1）进行加密并被存储。此外，在要求在设备之间传送种子信息（种子2）的配置中，种子信息（种子2）和记录密钥（K2）都在发送/接收之前由会话密钥加密。利用这种配置，通过从信息记录介质和数据传送路径的数据获取来分析种子信息（种子2）变得困难。因此，通过增加通过使用种子信息生成的密钥信息的分析难度和加密算法的分析，可以实现高安全级别的内容保护。

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