| 一种分层加密在数字电视条件接收系统中的应用 |
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| 引用本文： | 谢毅,杨天奇,欧阳金方.一种分层加密在数字电视条件接收系统中的应用[J].暨南大学学报,2007,28(3):251-254. |
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| 作者姓名： | 谢毅 杨天奇 欧阳金方 |
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| 作者单位： | 1. 暨南大学广播电视,广东,广州,510632
2. 暨南大学计算机科学系,广东,广州,510632 |
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| 摘 要： | 条件接收系统(CAS)为数字电视的运营提供了必要的技术手段. 条件接收系统为了防止信息被窃,密钥应及时更新,使得加密算法不能轻易被破译;同时还要节省带宽,减少算法的计算时间. 针对以上的特点,结合条件接收系统中多层加密体系,提出了一种分层加密方法,提高了整个系统的安全性和效率,降低了带宽.
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| 关 键 词： | 分层加密 条件接受 数字电视 分层加密 数字电视 条件接收系统 应用 system access conditional digital television mechanism encryption layer 节省带宽 效率 安全性 加密方法 加密体系 结合 时间 计算 加密算法 |
| 文章编号： | 1000-9965（2007）03-0251-04 |
| 修稿时间： | 2006-09-15 |
Application of a layer encryption mechanism in digital television conditional access system |
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| XIE Yi,YANG Tian-qi,OUYANG Jin-fang.Application of a layer encryption mechanism in digital television conditional access system[J].Journal of Jinan University(Natural Science & Medicine Edition),2007,28(3):251-254. |
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| Authors: | XIE Yi YANG Tian-qi OUYANG Jin-fang |
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| Institution: | 1. Broadcast Department, 2. Department of Computer Science, Jinan University, Guangzhou 510632, China |
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| Abstract: | Conditional access system(CAS) provides necessary technologies for digital television broadcast platform.For avoiding information filched,CAS guarantees!that the encryption mechanism is very difficult to be decrypted.Further more,encryption algorithms must operate in short calculating time.Aiming at those characteristics and combining layer encryption mechanism in CAS,Multilayer Encryption Mechanism is studied and two encryption algorithms are improved.It can effectively improve information security and gathering performance. |
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| Keywords: | layer encryption mechanism conditional access system digital TV |
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