发明名称 |
Method for updating key in DCATV conditional access system |
摘要 |
The present invention properly updates a key in various situations in order to secure liability of a service in a conditional access system for a digital cable television service. A method for updating a key in a conditional access system of a digital cable television service includes the step of receiving a request of changing service from a point of deployment (POD) module of subscriber having bidirectional or simplex receiver, changing a service at the head/end and sending an entitlement management message (EMM) having a changed key from the head/end to the point of deployment (POD) module.
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申请公布号 |
US2004123313(A1) |
申请公布日期 |
2004.06.24 |
申请号 |
US20030732024 |
申请日期 |
2003.12.09 |
申请人 |
KOO HAN-SEUNG;KWON EUN-JUNG;KIM TAEKYOON;KWON O-HYUNG;AHN CHIETEUK |
发明人 |
KOO HAN-SEUNG;KWON EUN-JUNG;KIM TAEKYOON;KWON O-HYUNG;AHN CHIETEUK |
分类号 |
H04N7/10;H04N7/16;H04N7/167;(IPC1-7):H04N7/16 |
主分类号 |
H04N7/10 |
代理机构 |
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地址 |
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