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    • 88. 发明授权
    • Information recording processing apparatus, information reproduction processing apparatus, information recording medium, information recording processing method, information reproduction processing method, and computer program
    • 信息记录处理装置,信息再现处理装置,信息记录介质,信息记录处理方法,信息再现处理方法和计算机程序
    • US07796754B2
    • 2010-09-14
    • US10971968
    • 2004-10-22
    • Shoei Kobayashi
    • Shoei Kobayashi
    • H04N7/167G01R31/28
    • G11B20/18G11B20/00086G11B20/0021G11B20/00282G11B20/00376G11B20/00405G11B20/00652
    • An information recording and/or reproduction processing apparatus is provided. The information recording and/or reproduction processing apparatus is provided by which additional information such as copy protection information is recorded as encrypted data on an information recording medium and also a cryptographic key is recorded such that the difficulty in analysis thereof is promoted. Where additional information such as copy protection information is encrypted and recorded and also a cryptographic key for the encrypted additional information is recorded together, a seed is generated based on an error correction code set corresponding to the additional information. Then, a scrambling or bit position conversion process in which random numbers generated based on the seed are applied is executed for the cryptographic key data, and resulting cryptographic key data is recorded on an information recording medium. Upon such recording, the additional information is recorded as pit information while the cryptographic key data is recorded as wobble data. The cryptographic key has an increased difficulty in analysis and allows achievement of an efficient data reproduction process.
    • 提供了一种信息记录和/或再现处理装置。 提供信息记录和/或再现处理装置,通过该信息记录和/或再现处理装置,将诸如复制保护信息的附加信息作为加密数据记录在信息记录介质上,并且还记录密码密钥,从而促进其分析的难度。 在加密和记录诸如复制保护信息的附加信息以及加​​密附加信息的加密密钥被一起记录的情况下,基于与附加信息对应的纠错码组生成种子。 然后,对加密密钥数据执行其中应用基于种子生成的随机数的加扰或比特位置转换处理,并将所得到的加密密钥数据记录在信息记录介质上。 在这种记录时,附加信息被记录为凹坑信息,而密码密钥数据被记录为摆动数据。 加密密钥在分析中的难度增加并且能够实现有效的数据再现过程。