摘要
为了实现对数字彩色图像信息的有效保护,提出了一种基于Lorenz混沌序列的彩色图像加密及抗剪切攻击解密算法。对Lorenz系统输出的三维混沌序列进行改进,使其具有理想的伪随机特性。根据这三维序列依次改变RGB三分量图像的像素位置和像素值,从而实现图像加密;解密时,给出一种基于邻域相邻像素特性的加密图像抗剪切攻击恢复算法。最后应用评价指标对加解密效果和安全性进行分析。理论分析和实验结果表明,该算法密钥空间大,具有较好的加解密效果和效率,并对统计分析具有较好的安全性和较强的抗剪切攻击能力。
In order to protect digital color image＇ s information, a color image encryption algorithm based on Lorenz chaos sequence and its decryption method protect from shearing attack are presented. Firstly, 3D Lorenz chaotic sequences are improved to be with ideal pseudo-randomness. Then, the RGB components image＇ s pixel positions are shifted and the pixel value is altered based on the 3D sequence so that the image will be scrambled and encrypted. While doing the decryption, a method is provided based on the neighboring pixels characteristic to renew the image attacked by sheafing. Lastly, the effects ofencryption, decryption and security are also analyzed by using the method of accessing. Theoretical analysis and experimental results show that the algorithm has a large space of keys, a good encryption and decryption effects and efficiency, a better security performance to statistical analysis and strongly against sheafing attacks ability.
出处
《计算机工程与设计》
CSCD
北大核心
2011年第2期509-512,516,共5页
Computer Engineering and Design
作者简介
廖琪男（1964--），男，广西南宁人，高级工程师，研究方向为数字图像处理、数字图像加密、数字图像信息隐藏和数字水印。E—mail：lqner@163．com
