发明授权
US5982886A Unauthorized use preventing method for optical disks, optical disk
having unauthorized use prevention function, and optical disk apparatus
失效
未经授权的光盘防止方法，具有未经授权的使用防止功能的光盘以及光盘装置
- 专利标题： Unauthorized use preventing method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus
- 专利标题（中）： 未经授权的光盘防止方法，具有未经授权的使用防止功能的光盘以及光盘装置
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申请号： US730654申请日： 1996-10-11
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公开(公告)号： US5982886A公开(公告)日： 1999-11-09
- 发明人: Satoshi Itami , Kenichi Utsumi , Masahiro Nakada , Hiroshi Suzuki , Kazunori Naito , Kazuo Nakashima , Toshikatsu Narumi , Masaru Nakahara
- 申请人： Satoshi Itami , Kenichi Utsumi , Masahiro Nakada , Hiroshi Suzuki , Kazunori Naito , Kazuo Nakashima , Toshikatsu Narumi , Masaru Nakahara
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX4-061882 19920318; JPX4-062608 19920318; JPX4-062609 19920318; JPX4-129092 19920521
- 主分类号： G06F1/00
- IPC分类号： G06F1/00 ; G06F21/10 ; G06F21/80 ; G11B7/0037 ; G11B20/00 ; G11B20/12 ; G11B23/28 ; H04L9/00 ; G11B7/013
摘要：
In a method for preventing unauthorized use of a recording medium having a user accessible area and a user inaccessible area, first information is read from the user inaccessible area of the recording medium. The first information is compared with second information concerning a true recording medium (lawfully produced copy). It is then concluded that the recording medium is the true recording medium when the first information corresponds to the second information.
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