发明名称 |
DIGITAL DATA STORAGE/REPRODUCTION METHOD AND DEVICE |
摘要 |
There is provided a digital data storage method. For digital data whose content is changed with time lapse, a predetermined span tau is partially encrypted for each predetermined time T. Here, the encryption is performed so that the ratio of the span tau of the encryption part with respect to the time T and the span tau occupied by the encryption part are sufficiently small. The digital data encrypted is stored.
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申请公布号 |
KR20050122209(A) |
申请公布日期 |
2005.12.28 |
申请号 |
KR20057017243 |
申请日期 |
2005.09.14 |
申请人 |
SONY CORPORATION |
发明人 |
KOIKE TAKASHI;IWATSU TAKESHI;KIMURA MANABU |
分类号 |
G11B20/10;G09C1/00;G10L19/00;G11B20/00;G11B20/12;H04K1/00;(IPC1-7):G11B20/10 |
主分类号 |
G11B20/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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