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中国科学院大学学报 ›› 2011, Vol. 28 ›› Issue (5): 659-667.DOI: 10.7523/j.issn.2095-6134.2011.5.014

• 论文 • 上一篇    下一篇

一种基于Web通信行为的抗审查隐蔽通信协议

谭庆丰, 时金桥, 郭莉, 王啸   

  1. 中国科学院计算技术研究所信息安全研究中心,北京市信息内容安全技术国家工程实验室, 北京 100190
  • 收稿日期:2010-08-07 修回日期:2010-11-07 发布日期:2011-09-15
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2007CB311100)资助 

A censorship-resistant covert communication protocol based on Web communication behavior

TAN Qing-Feng, SHI Jin-Qiao, GUO Li, WANG Xiao   

  1. Information Security Research Center, Institute of Computing Technology, Chinese Academy of Sciences; Chinese National Engineering laboratory for Information Security Technologies, Beijing 100190, China
  • Received:2010-08-07 Revised:2010-11-07 Published:2011-09-15

摘要:

以往基于TCP/IP协议或HTTP协议的隐蔽通信方式通常是利用协议本身各个字段的特点,将信息隐藏在协议的各个字段中.这种方式往往会具有某种结构特征,而基于计时的隐蔽通信又往往具有某种流模式.基于非对称通信理论和马尔科夫模型的Web行为预测,提出一种基于Web通信行为的抗流量审查隐蔽通信协议.重点描述隐蔽通信协议和原型系统,并分析协议的安全性.测试结果表明,该方法具有很高的效率和安全性.

关键词: 隐蔽通信, 抗审查, Web通信行为

Abstract:

The existing covert communication method based on TCP/IP or HTTP often utilizes characteristics of protocol and hides extra data in specific fields of protocol header. Such a method leaves some obvious signatures. However, timing-based covert communications have some kind of traffic pattern. We propose a censorship-resistant covert communication protocol based on Web communication behavior, which combines dynamic asymmetric communication and Markov model-based Web usage prediction. In this paper we focus on covert communication protocol, prototype system, and security of the protocol. The test results show that our method has high performance and safety.

Key words: covert communication, censorship-resistant, Web communication behavior

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