发明名称 |
Information-signal encrypting apparatus and information-signal decrypting apparatus |
摘要 |
In an apparatus for encrypting an information signal into an encryption-resultant signal, a first encryption key peculiar to the present apparatus is generated. Key information is read out from a replaceable recording medium. A decision is made as to whether or not the read-out key information has been generated by an apparatus different from the present apparatus. A second encryption key is generated in response to the read-out key information when it is decided that the read-out key information has been generated by an apparatus different from the present apparatus. One is selected from the first encryption key and the second encryption key as a final encryption key. An information signal is encrypted in response to the final encryption key.
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申请公布号 |
US7661001(B2) |
申请公布日期 |
2010.02.09 |
申请号 |
US20040925963 |
申请日期 |
2004.08.26 |
申请人 |
VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
HIGURASHI SEIJI |
分类号 |
G06F11/30;G06F12/14;G06F21/00;G06K17/00;G07F7/10;G11B20/00;H04K1/00;H04L9/10;H04L9/14 |
主分类号 |
G06F11/30 |
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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