摘要： ：分析了一种基于混沌映射的抗剪切鲁棒水印算法。根据密钥空间的两种不同选择方式，分别给出了一个选择明文攻击方案。对于 大小的水印图像，攻击方案的选择明文量分别为1幅载体图像和 幅水印图像，计算复杂度分别为1次和( )次水印，成功率均为1。理论分析和实验证明，该水印算法是不安全的。

关键词: 密码分析, 选择明文攻击, 数字水印, 混沌映射

Abstract: This paper analyzes a resisting cropping robust watermarking algorithm based on chaotic map. Two plaintext-chosen attacks are proposed respectively according to the two different ways of choosing key spaces. Data complexities of the two attacks are 1 cover image and watermark images, and the computing complexities are 1 and computations of watermarking algorithm respectively. Success rates of them are both 1. Theoretic analysis and experimental results show the watermarking algorithm is insecure.

Key words: cryptanalysis, plaintext-chosen attack, digital watermarking, chaotic mapping

中图分类号: 

• TN918