计算机应用 ›› 2012, Vol. 32 ›› Issue (09): 2603-2605.DOI: 10.3724/SP.J.1087.2012.02603

• 信息安全 • 上一篇    下一篇

混沌文本零水印的词法主动攻击

李婧1,2*,房鼎益1,何路1   

  1. 1.西北大学 信息科学与技术学院,西安 710127;
    2.陕西理工学院 数学与计算机科学学院,陕西 汉中 723000
  • 收稿日期:2012-03-26 修回日期:2012-05-05 发布日期:2012-09-01 出版日期:2012-09-01
  • 通讯作者: 李婧
  • 作者简介:李婧(1982-),女,陕西汉中人,讲师,硕士研究生,主要研究方向:数字水印、信息安全; 房鼎益(1959-),男,陕西汉中人,教授,博士生导师,博士,主要研究方向:网络与信息安全、无线传感器网络、移动计算、分布计算系统; 何路(1977-),男,江苏徐州人,讲师,博士研究生,主要研究方向:网络与信息安全。

Lexical active attack on chaotic text zero-watermarking

LI Jing1,2*,FANG Ding-yi1,HE Lu1   

  1. 1.School of Information Science and Technology,Northwest University,Xi'an Shaanxi 710127,China;
    2.School of Mathematics and Computer Science,Shaanxi University of Technology,Hanzhong Shaanxi 723000,China
  • Received:2012-03-26 Revised:2012-05-05 Online:2012-09-01 Published:2012-09-01

摘要: 为了解决传统的密写分析技术对文本零水印失效的问题,提出一种基于词法的主动攻击算法。该算法将目前鲁棒性较好的混沌文本零水印作为攻击对象,采用同义词替换技术,定义了同步攻击和生日攻击两种方法,通过将这两种方法相结合,在词这一级别上实现了对文本零水印的主动攻击。实验结果表明,该算法无需大量改写载体文本即可有效地破坏零水印。

关键词: 文本水印, 零水印, 主动攻击, 同义词替换, 自然语言处理

Abstract: The conventional steganalysis techniques does not work in zero-watermarking technology because it does not modify carrier text. However, active attack model on text zero-watermarking has not been well studied. In order to solve this problem, an active attack algorithm for text zero-watermarking was proposed. Making use of synonym substitution technology, sync-attack and birthday-attack were defined. Through combining the two active attack methods, a lexical active attack algorithm on text zero-watermarking was designed and implemented. The experimental result shows the proposed algorithm can effectively destroy zero-watermarking without modifying carrier text massively.

Key words: text watermarking, zero-watermarking, active attack, synonym substitution, natural language processing

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