图像加密技术新进展

本文综述了图像加密技术的最新进展,阐述了近几年发展起来的（1）基于矩阵变换/像素置换;（2）基于伪随机序列;（3）基于SCAN语言;（4）基于“密钥图像”;（5）基于四叉树编码及SCAN语言;（6）基于矢量量化压缩编码及商业密码等图像加密技术,比较了他们的优缺点和适用范围．文章尤其详细介绍了混沌加密技术,指出了应用混沌技术的好处和一些值得进一步研究的问题．

THE NEW EVOLUTION OF IMAGE ENCRYPTION TECHNIQUES

In this paper, the authors summarized the latest development of the image encryption techniques. Some techniques such as (1) matrix transform/pixel permutation based, (2) pseudo-random sequences based, (3) SCAN language based, (4) "secret key image" based, (5) SCAN language with quadtree coding based, and (6) commercial cryptography with vector quantization coding based image encryption techniques were illustrated. Advantages and disadvantages of these algorithms were compared and the suitability was discussed respectively. Particularly, the chaotic image encryption technique was presented; some advantages with chaotic technique were illustrated and some valuable problems were pointed out for further research.