发明名称 |
Information recording and playback devices and methods, information recording media and program providing media used therewith |
摘要 |
When the recording mode of an information recording/playback device is a cognizant mode which analyzes embedded copy control information, the information recording/playback device performs content encryption using a content-encryption key generated by using a cognizant key as a content-encryption-key generating key in the cognizant mode. When the recording mode of the information recording/playback device is a non-cognizant mode which does not analyze the embedded copy control information, the information recording/playback device performs content encryption using a content-encryption key generated by using a cognizant key as a content-encryption-key generating key in the non-cognizant mode. By using these techniques, the above two recording modes are clearly distinguished and separately executed. This prevents an encryption mode indicator as copy control information and embedded copy control information from being mismatched. <IMAGE> |
申请公布号 |
EP1187127(B1) |
申请公布日期 |
2009.09.23 |
申请号 |
EP20010307386 |
申请日期 |
2001.08.30 |
申请人 |
SONY CORPORATION |
发明人 |
ASANO, TOMOYUKI;OSAWA, YOSHITOMO |
分类号 |
G06F12/14;G11B20/00;G06F21/10;G09C5/00;G11B20/10;G11B20/12;H04L9/08;H04N5/781;H04N5/85;H04N5/907;H04N5/91;H04N5/913;H04N5/92;H04N7/08;H04N7/081;H04N7/167;H04N9/79;H04N9/804;H04N21/4405;H04N21/4408;H04N21/4623 |
主分类号 |
G06F12/14 |
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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