发明名称 |
Enciphering/deciphering device using a cryptographic key changed at a predetermined timing |
摘要 |
<p>An enciphering/deciphering apparatus and method are provided by which illegal copying can be prevented with a greater degree of certainty. Data enciphered by a 1394 interface (26) of a DVD player (1) is transmitted to a personal computer (2) and a magneto-optical disk apparatus (3) through a 1394 bus (11). In the magneto-optical disk apparatus (3) with which a change to a function is open to a user, the received data is deciphered by a 1394 interface (36). In contrast, in the personal computer (2) with which a change to a function is open to a -user, the enciphered data is deciphered using a time variable key (50) by a 1394 interface (49), and a result of the decipherment is further deciphered using a session key by an application section.</p> |
申请公布号 |
EP1742137(B1) |
申请公布日期 |
2014.08.20 |
申请号 |
EP20060076723 |
申请日期 |
1998.04.20 |
申请人 |
SONY CORPORATION |
发明人 |
ISHIGURO, RYUJI;OSAWA, YOSHITOMO;OSAKABE, YOSHIO;SATO, MAKOTO;SHIMA, HISATO;ASANO, TOMOYUKI |
分类号 |
G06F1/00;H04L9/08;G06F3/06;G06F13/00;G06F21/00;G09C1/00;G11B20/00 |
主分类号 |
G06F1/00 |
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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