发明名称 |
Security device and head end in conditional access system and method for controlling illegal use in the system |
摘要 |
A security device and a head end of a conditional access system (CAS), and a method for controlling illegal use of the conditional access system, capable of minimizing the number of entitlement management messages (EMMs) to be distributed from a head end to a user are provided. Update keys encrypted with user keys and channel management keys encrypted with the update keys are utilized.
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申请公布号 |
US7810113(B2) |
申请公布日期 |
2010.10.05 |
申请号 |
US20060401385 |
申请日期 |
2006.04.11 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM DAE-YOUB;KIM HWAN-JOON;SUNG MAENG-HEE;JIN WEON-IL |
分类号 |
H04L9/00 |
主分类号 |
H04L9/00 |
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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