计算机工程 ›› 2011, Vol. 37 ›› Issue (12): 125-126.doi: 10.3969/j.issn.1000-3428.2011.12.042

• 安全技术 • 上一篇    下一篇

基于混沌序列的脆弱数字水印算法

曹 家,王 轩   

  1. (哈尔滨工业大学深圳研究生院,广东 深圳 518055)
  • 收稿日期:2010-12-19 出版日期:2011-06-20 发布日期:2011-06-20
  • 作者简介:曹 家(1986-),男,硕士,主研方向:数字水印;王 轩,教授、博士生导师

Fragile Digital-watermark Algorithm Based on Chaotic Sequence

CAO Jia, WANG Xuan   

  1. (Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China)
  • Received:2010-12-19 Online:2011-06-20 Published:2011-06-20

摘要:

为解决Yeung-Mintzer脆弱水印算法的安全性问题,提出一种基于混沌序列的水印算法。采用混沌序列对Yeung-Mintzer脆弱水印算法进行改进,得到更好的水印不可见性和篡改检测率,同时保留原算法运算速度快、检测定位能力强、盲检测等优点。理论分析和实验结果证明,该算法可以应用于法律证据图像、医疗图像等安全性和图像质量要求高的领域,有效地检测对图像的篡改部分。

关键词: 数字水印, 脆弱, 图像认证, 拼贴攻击, 篡改定位

Abstract:

This paper proposes a new watermark algorithm based on the chaotic sequence to solve the security problems of Yeung-Mintzer algorithm and it has a significant improvement on the image invisibility and the tamper detection rate, while retains the other advantages. The method is intended for use in image verification applications, where one is interested in knowing whether and where the content of an image is altered maliciously. Theoretical analysis and experimental results prove that this algorithm has a great practicability and can be used for legal evidence image and medical image.

Key words: digital watermark, fragile, image authentication, collage attack, tamper localization

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