北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (3): 46-49.doi: 10.13190/jbupt.200803.46.281

• 论文 • 上一篇    下一篇

被动攻击下的信息隐藏系统性能分析

叶天语, 钮心忻, 杨义先   

  1. 北京邮电大学 网络与交换技术国家重点实验室, 北京 100876
  • 收稿日期:2007-11-17 修回日期:1900-01-01 出版日期:2008-06-28 发布日期:2008-06-28
  • 通讯作者: 叶天语

Analysis on the Performances of Information Hiding System under Passive Attack

YE Tian-yu, NIU Xin-xin, YANG Yi-xian   

  1. Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2007-11-17 Revised:1900-01-01 Online:2008-06-28 Published:2008-06-28
  • Contact: YE Tian-yu

摘要:

针对被动攻击下的信息隐藏系统,建立一个具体的信息隐藏统计模型,从安全性、失真距离度量、信道容量3个角度全面分析该模型.信道容量问题的求解抽象成一个受到平均汉明失真距离和平均安全性约束的最优化问题,只要给定需要的参数就可以运用最优化理论得到最优解.最后求解出原始载体序列和秘密信息序列均服从均匀分布时的统计模型信道容量.

关键词: 被动攻击, 信息隐藏, 信道容量, 最优化理论

Abstract:

With respect to information hiding system under passive attacks, a concrete statistical model of information hiding system was built and its performance was analyzed, including security, distortion distance metric, and channel capacity. The solution to channel capacity can be regarded, subjected to average hamming distortion distance and average security coefficient, as an optimization problem,. As long as the required parameters are given, the optimization problem of channel capacity will be easy be solved when using optimization theory. Finally, the channel capacity of statistical model is derived on the condition that both original cover sequence and secret information sequence obey to uniform distributions.

Key words: passive attack, information hiding, channel capacity, optimization theory

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