发明授权
US08127148B2 Information recording device, information playback device, information recording method, information playback method, and information recording medium and program providing medium used therewith
失效
信息记录装置，信息重放装置，信息记录方法，信息重放方法以及与其一起使用的信息记录介质和程序提供介质
- 专利标题： Information recording device, information playback device, information recording method, information playback method, and information recording medium and program providing medium used therewith
- 专利标题（中）： 信息记录装置，信息重放装置，信息记录方法，信息重放方法以及与其一起使用的信息记录介质和程序提供介质
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申请号： US11237220申请日： 2005-09-28
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公开(公告)号： US08127148B2公开(公告)日： 2012-02-28
- 发明人: Tomoyuki Asano , Yoshitomo Osawa
- 申请人： Tomoyuki Asano , Yoshitomo Osawa
- 申请人地址： JP Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- 优先权： JP2000-270919 20000907
- 主分类号： H04L9/14
- IPC分类号： H04L9/14 ; G06F12/14
摘要：
An information recording/playback device stores beforehand, on a recording medium, secret information in which a writing/reading method thereof cannot be analyzed and which can be read only by a special reading method. The secret information is applied to a key for content encryption or decryption when performing recording or playback of contents on the recording medium, such as music data and image data. The secret information is, for example, a stamper ID. By using the stamper ID as secret information, and a master key and a media key which are distributed in a tree-structure key-distribution system, a content-cryptosystem key is generated. Accordingly, each content is allowed to be used in only an appropriate device in which the special reading method for the secret information can be executed and to which the key is distributed by the tree-structure key-distribution system.
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