基于小波变换和Feistel密码结构的图像置乱技术  

Digital Image Scrambling Technology Based on Wavelet Transformation and Feistel Cryptography Structure

作　　者：赵刚[1] 李建平[2] 唐真[3] 张奕[4] 

机构地区：[1]后勤工程学院训练部,重庆400016 [2]后勤工程学院国际小波分析应用研究中心,重庆400016 [3]后勤工程学院科研部,重庆400016 [4]后勤工程学院后勤信息工程系,重庆400016

出　　处：《后勤工程学院学报》2008年第3期55-58,77,共5页Journal of Logistical Engineering University

基　　金：国家自然科学基金资助项目(10471151);国家863计划资助项目(2007AA01Z423)

摘　　要：由于图像信息在网络进行传输时，很容易被非法截取，而隐写术能起到保护机密信息免受攻击的作用，因而得到了广泛的研究和应用。置乱技术虽然是隐写术的预处理过程，但它在隐写术中起着非常重要的作用。提出了一种新的基于小波变换和Feistel密码结构的图像置乱方法，其置乱的对象是载体图像中的小波系数，置乱算法基于Feistel密码结构，密钥采用变形约瑟夫遍历产生，属于“一次一密”的密钥生成。将该方法用于油料信息图像隐藏实验取得了良好的效果。During transmission image information can be easily intercepted, and the steganography can protect the secret information from being extensively researched and applied. Although the scrambling technology is the preprocessing of steganography, but the steganography plays a very important role in the information security. This paper presents a new scrambling method based on wavelet transformation and Feistel cryptography structure. The processing object is the wavelet coefficients of the image. Scrambling algorithm is based on the Feistel cryptography structure and the keys generated from by Joseph traverse. The key generation belongs to the definition of one-time pad. In addition, the method has been used to hide the images of oil information according to the results of the experiment and the scrambling algorithms have achieved good results.

关 键 词：小波变换 隐写术 置乱算法 约瑟夫遍历 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]