Invention Grant
US07810113B2 Security device and head end in conditional access system and method for controlling illegal use in the system
失效
条件访问系统中的安全设备和头端以及系统中非法使用的控制方法
- Patent Title: Security device and head end in conditional access system and method for controlling illegal use in the system
- Patent Title (中): 条件访问系统中的安全设备和头端以及系统中非法使用的控制方法
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Application No.: US11401385Application Date: 2006-04-11
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Publication No.: US07810113B2Publication Date: 2010-10-05
- Inventor: Dae-youb Kim , Hwan-joon Kim , Maeng-hee Sung , Weon-il Jin
- Applicant: Dae-youb Kim , Hwan-joon Kim , Maeng-hee Sung , Weon-il Jin
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: NSIP Law
- Priority: KR10-2005-0045086 20050527
- Main IPC: H04L9/00
- IPC: H04L9/00
Abstract:
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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