应用科学学报 ›› 2012, Vol. 30 ›› Issue (5): 524-530.doi: 10.3969/j.issn.0255-8297.2012.05.014

• 信号与信息处理 • 上一篇    下一篇

一种新的隐形流水印技术

张连成, 王振兴, 徐静   

  1. 解放军信息工程大学信息工程学院,郑州450002
  • 收稿日期:2011-02-15 修回日期:2011-10-13 出版日期:2012-09-24 发布日期:2012-09-25
  • 通信作者: 张连成,博士,讲师,研究方向:流量分析、网络安全,E-mail: liancheng17@gmail.com E-mail:liancheng17@gmail.com
  • 作者简介:张连成,博士,讲师,研究方向:流量分析、网络安全,E-mail: liancheng17@gmail.com;王振兴,教授,博导,研究方向:流量分析、网络与信息安全,E-mail: wzx05@sina.com
  • 基金资助:

    国家“973”重点基础研究发展计划基金(No.2007CB307102);国家“863”高技术研究发展计划基金(No.2007AA01Z2A1)资助

A Novel Invisible and Private Flow Watermarking Scheme

ZHANG Lian-cheng, WANG Zhen-xing, XU Jing   

  1. College of Information Engineering, PLA Information Engineering University, Zhengzhou 450002, China
  • Received:2011-02-15 Revised:2011-10-13 Online:2012-09-24 Published:2012-09-25

摘要:

已有的流水印技术向数据流中引入的时延较大,导致攻击者很容易检测和移除其中嵌入的水印信息,甚至将水印消息复制到其他未标记数据流中误导追踪. 针对该问题,引入扩频编码,提出一种新的隐形流水印技术. 对于不同的数据流和不同的水印位使用不同的伪噪声码进行扩展,通过轻微调制随机选择的包间隔到达时延来嵌入水印信息. 理论分析和实验结果表明:该方法对于时序扰乱具有鲁棒性,可有效进行多流追踪,且对基于Kolmogrov-Smirnov 测试的时序分析攻击不可见.

关键词: 私有流水印, 包间隔时延, 扩频, Kolmogrov-Smirnov 测试

Abstract:

Existing active flow watermarking techniques introduce significant delays to target flows, enabling attackers to detect and remove the inserted watermark from the flow, and even duplicate them to unmarked flows. We propose a novel invisible and private flow watermarking scheme that embeds watermarks in randomly chosen inter-packet delay positions. Different pseudo-noise codes are used across multiple network flows
by slightly manipulating the arrival times of the packets. Theoretical analysis and experimental results demonstrate that the proposed scheme is robust against timing perturbation, effective in detecting multiple network flows, and invisible to timing analysis attack based on the Kolmogrov-Smirnov test.

Key words: private flow watermarking, inter-packet delay, spread spectrum, Kolmogrov-Smirnov test

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