发明公开
EP0817185A2 Enciphering method, deciphering method, recording and reproducing method, deciphering device, deciphering unit device, recording medium, recording-medium manufacturing method, and key control method
失效
加密方法，解密方法，记录和重放方法，解密装置，用于解密单元，记录介质，记录介质的制造方法以及密钥的控制方法
- 专利标题： Enciphering method, deciphering method, recording and reproducing method, deciphering device, deciphering unit device, recording medium, recording-medium manufacturing method, and key control method
- 专利标题（中）： 加密方法，解密方法，记录和重放方法，解密装置，用于解密单元，记录介质，记录介质的制造方法以及密钥的控制方法
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申请号： EP97304636.0申请日： 1997-06-27
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公开(公告)号： EP0817185A2公开(公告)日： 1998-01-07
- 发明人: Kato, Takehisa , Endoh, Naoki , Unno, Hiroaki , Kojima, Tadashi , Hirayama, Koichi
- 申请人： KABUSHIKI KAISHA TOSHIBA
- 申请人地址： 72, Horikawa-cho, Saiwai-ku Kawasaki-shi JP
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址： 72, Horikawa-cho, Saiwai-ku Kawasaki-shi JP
- 代理机构： Waldren, Robin Michael
- 优先权： JP170399/96 19960628; JP136709/97 19970527
- 主分类号： G11B20/00
- IPC分类号： G11B20/00 ; G11B23/28 ; H04N7/16 ; H04L9/00 ; H04N5/913
摘要：
On a recording medium, first information obtained by enciphering data with the first key and second information obtained by enciphering the first key with each of the predetermined second keys are recorded. A deciphering method is characterized by comprising the steps of inputting the first and second information (S34, S32), deciphering the first key using at least one of the second keys (S33), determining by a specific method that the obtained first key is correct (S33), and then deciphering the data using the first key to obtain the data (S35).
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