基于Huffman编码的双重脆弱水印算法

Double Fragile Watermarking Algorithm Based on Huffman Encoding

提出一种基于Huffman编码的双重脆弱水印算法。该算法用Huffman编码来压缩分块图像的第一重脆弱水印,在剩余的位中嵌入另一重脆弱水印。实验结果表明,该算法可以检测出任意像素值的改动、图像大小的改变,并且可以检测出拼贴攻击和基于Hash碰撞的替换攻击。该方法简单、有效、实用、而且更安全。

This paper presents a double fragile watermarking algorithm based on Huffman encoding. In this algorithm, the first watermarking of blocked image is compared with Huffman encoding and another fragile watermarking is embedded in the left bit. It is showed by experiments results that the proposed algorithm can detect any change made to an image, including the change in pixel values and image size, and can detect the 'collage-attack' and the 'substitution-attack' based on Hash collision. The algorithm is simple, effective, utilizable, and more secure.