摘要
在4级密钥分配机制的基础上,提出了一种基于分组访问控制的4级密钥分配算法.该算法在获得较高效率和安全性的同时,大大降低了加密的计算量和复杂度,而且能够灵活处理用户的加入与离开,使得运营商能够很方便地动态管理收视用户.通过分析和比较算法的安全性和性能表明,所提出算法非常适合于实际应用.
Based on four-level key hierarchy, a new key distribution scheme based on grouping access control for conditional access system in digital TV （DTV） broadcasting was presented. The key distribution scheme can greatly reduce computation load and complexity while providing higher security. Moreover, the proposed scheme is flexible in processing joining and leaving of subscriber, which makes service provider easy to manage the subscribers dynamically. In the end, the security and performance of the proposed scheme were analyzed and compared with other schemes. It shows that the proposed scheme is very feasible for practical applications.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2006年第5期730-733,738,共5页
Journal of Shanghai Jiaotong University
基金
信息产业部电子发展基金项目
关键词
条件接收系统
数字电视
分级和分组
密钥分配
conditional access system
digital TV （DTV）
grouping and hierarchy
key distribution
