计算机应用 ›› 2014, Vol. 34 ›› Issue (6): 1689-1693.DOI: 10.11772/j.issn.1001-9081.2014.06.1689

• 计算机安全 • 上一篇    下一篇

基于细胞自动机与奇异值分解的零水印算法

吴伟民,丁冉,林志毅,邹勤辉   

  1. 广东工业大学 计算机学院, 广州 510006
  • 收稿日期:2013-12-03 修回日期:2014-01-26 出版日期:2014-06-01 发布日期:2014-07-02
  • 通讯作者: 丁冉
  • 作者简介:吴伟民(1956-),男,广东深圳人,教授,CCF会员,主要研究方向:可视计算、数据安全、智能系统;丁冉(1990-),男,安徽宣城人,硕士研究生,主要研究方向:数字水印、可视计算、数据安全;林志毅(1981-),男,福建泉州人,讲师,博士,主要研究方向:自然计算、模式识别;邹勤辉(1992-),男,广东肇庆人,主要研究方向:信息安全。
  • 基金资助:

    广州市科技计划项目

Zero-watermarking algorithm based on cellular automata and sigular value decomposition

WU Weimin,DING Ran,LIN Zhiyi,ZOU Qinhui   

  1. Faculty of Computer, Guangdong University of Technology, Guangzhou Guangdong 510006 China
  • Received:2013-12-03 Revised:2014-01-26 Online:2014-06-01 Published:2014-07-02
  • Contact: DING Ran

摘要:

针对常规水印算法对JPEG压缩与几何攻击鲁棒性较差的问题,提出了一种基于细胞自动机(CA)变换与奇异值分解(SVD)的零水印算法。首先对图像进行二维细胞自动机变换,分离出低频近似图像并保存作为密钥的变换参数;然后对低频图像分块并在每个子块上进行奇异值分解,通过细胞自动机变换规则在每个子块的奇异值矩阵上构造零水印;最后,图像认证时根据两个图像的水印相似度是否大于阈值来判断图像是否遭遇篡改。通过实验证明,该水印算法具有良好的不可见性和安全性,并且对于JPEG压缩与几何攻击表现出较强的鲁棒性。

Abstract:

Concerning the problem of low robustness of general watermarking algorithms in resisting JPEG compression and geometric transform attacks, a zero-watermarking algorithm based on Cellular Automata (CA) and Singular Value Decomposition (SVD) was proposed. Firstly, an image was transformed by 2-dimensional cellular automata transform and the low-frequency subband approximation image were isolated, then the CA parameters was saved as key. After that, the approximation image was sub-blocked, and the blocks were decomposed by SVD, then the zero-watermark was constructed by CA rule in SVD matrix. In image authentication, the image could be certificated by comparing the similarity of two watermarks with the threshold value. The experimental result shows that this algorithm has good invisibility and perfect robustness in resisting JPEG compression and geometric transform attacks.

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