计算机应用 ›› 2012, Vol. 32 ›› Issue (01): 66-69.DOI: 10.3724/SP.J.1087.2012.00066

• 第四届中国计算机网络与信息安全学术会议论文(CCNIS’2011) • 上一篇    下一篇

网络编码下的网络电视条件接收系统关键技术

李伟键1,2   

  1. 1. 广东技术师范学院 计算机科学学院,广州 510665
    2. 华南理工大学 计算机科学与工程学院,广州 510641
  • 收稿日期:2011-08-01 修回日期:2011-09-11 发布日期:2012-02-06 出版日期:2012-01-01
  • 通讯作者: 李伟键
  • 作者简介:李伟键(1979-),男,广东汕头人,讲师,博士研究生,主要研究方向:网络编码安全、信道攻击、密码芯片。
  • 基金资助:

    广东高校优秀青年创新人才培育项目(LYM09097)

Key techniques of conditional access system for Internet-TV based on network coding

LI Wei-jian1,2   

  1. 1. School of Computer Science and Engineering, South China University of Technology, Guangzhou Guangdong 510641, China
    2. School of Computer Science, Guangdong Polytechnic Normal University, Guangzhou Guangdong 510665, China
  • Received:2011-08-01 Revised:2011-09-11 Online:2012-02-06 Published:2012-01-01
  • Contact: LI Wei-jian
  • Supported by:

    Program for Excellent and Creative Young Talents in Universities of Guangdong Province

摘要: 网络编码的主要优点是提高网络吞吐量、均衡网络负载以及提高带宽利用率,尤其适合无线网络、Ad Hoc、P2P以及流媒体传输等领域,在构建IP网络电视方面具有巨大的潜力。研究在网络编码下构建网络电视的条件接收系统,提出了一种基于随机网络编码(RLNC)和SPOC模型的轻量级加密方法和一种高效的层次组密钥分发管理方案。所提方案具有加密数据量非常小的优点,适合用于网络电视实时流媒体加密,同时结合MPEG多分辨率的特点,可以针对各种付费用户,根据不同的收费提供不同网络视频质量。性能分析表明,所提方案利用网络编码提高了网络吞吐量,同时加密数据量远小于传统的IP网络电视加密方法,层次组密钥分发管理方案有效解决了密钥分发问题。

关键词: 数据安全与计算机安全, 网络编码, 条件接收系统, 层次组密钥分发管理, 多分辨率, 网络电视

Abstract: Network coding has the advantage of providing higher network throughput, using bandwidth efficiently and balancing the traffic, which is suitable for wireless networks, Ad Hoc, P2P content distribution and streaming media service, especially for Internet-TV. The authors did some research into the conditional access system for Internet-TV under network coding, proposed a scheme for conditional access technique based on Random Linear Network Coding (RLNC) and Secure Practical Network Coding (SPOC), and hierarchical key distribution. This scheme also provided different media quality to different paying customers. The scheme has low-complexity cryptographic overhead, and it is thus suitable for the real-time encryption of streaming media. The performance analysis shows that the proposed scheme improves the throughput of Internet-TV, the quantity of encrypted data is far less than the traditional methods, and the hierarchical group key distribution effectively solves the problem of key distribution.

Key words: data and computer security, network coding, conditional access system, hierarchy group key distribution, multi-resolution, Internet-TV

中图分类号: