发明名称 |
METHOD FOR SECURING ENCRYPTED CONTENT BROADCAST BY A BROADCASTER |
摘要 |
The method involves generating a temporary encryption key (MCW) for encrypting a value permitting to determine encryption keys of content. The encrypted value is transmitted to a multimedia unit. Two cryptograms comprising temporary keys are encrypted by respective authorization keys of which one is proportional to a security module and another one is proportional to a group of security modules excluding the former module. |
申请公布号 |
EP1723790(A1) |
申请公布日期 |
2006.11.22 |
申请号 |
EP20050708066 |
申请日期 |
2005.03.01 |
申请人 |
NAGRACARD SA |
发明人 |
GROUX, CEDRIC;KSONTINI, RACHED;KUDELSKI, HENRI |
分类号 |
H04N7/167 |
主分类号 |
H04N7/167 |
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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