发明申请
- 专利标题: Digital data storage/reproduction method and device
- 专利标题(中): 数字数据存储/再现方法及装置
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申请号: US10551844申请日: 2004-03-26
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公开(公告)号: US20070106906A1公开(公告)日: 2007-05-10
- 发明人: Takashi Koike , Takeshi Iwatsu , Manabu Kimura
- 申请人: Takashi Koike , Takeshi Iwatsu , Manabu Kimura
- 申请人地址: JP Tokyo 141-0001
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo 141-0001
- 优先权: JP2003-107278 20030411
- 国际申请: PCT/JP04/04288 WO 20040326
- 主分类号: G06F12/14
- IPC分类号: G06F12/14
摘要:
A digital data storing method is provided in which digital data whose content varies as the time elapses is partially encrypted for each predetermined period τ at a predetermined time interval T. The encryption is done for the ratio of the period τ of the encrypted part to the predetermined time interval T and period τ of the encrypted part to be sufficiently small. The digital data thus encrypted is stored.