提取明文信息耦合多混沌像素混乱的彩图RGB分量同步无损加密算法  

Lossless encryption algorithm of color image RGB components based on extraction plaintext information coupled multi-chaotic pixel shuffle

作　　者：潘强[1] 印鉴[2] 

机构地区：[1]珠海城市职业技术学院,广东珠海519090 [2]中山大学信息科学与技术学院,广州510006

出　　处：《计算机应用研究》2015年第5期1512-1515,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61033010);广东省自然科学基金资助项目(S2011020001182)

摘　　要：针对当前的彩色图像加密方案都是将R、G、B三基色的像素分离来单独进行加密,且生成的混沌序列不依赖于明文信息,导致密文随机性和抗攻击性较差等不足,提出了提取明文信息耦合多混沌像素混乱的彩图RGB同步加密算法。首先,将图像RGB三基色的像素进行分离、二值化与矢量化处理,得到RGB三个矢量;重组这些矢量,得到R、G、B各像素均彼此依赖的置乱矩阵;然后,通过提取明文图像信息来控制四个超混沌系统的迭代,得到与明文相关的随机序列,对置乱矩阵完成列、行扩散。仿真结果表明,与其他彩图加密机制相比,加密系统的安全性更高,且密钥空间更大,密钥敏感性强。In order to solve these defects such as poor performance of cipher random as well as anti-attack induced by the obtained sequence aren＇t dependent on the plaintext and separately encrypting RGB pixel in current color image encryption systems,this paper proposed the lossless synchronously encryption algorithm of color image RGB components based on extraction plaintext information coupled multi-chaotic pixel shuffle. Firstly,it performed the operation of the color image RGB pixels separation,binarization and vectorization to get the three vectors of RGB,and regrouped theses vectors to obtain the permutation matrix of RGB pixels interaction. Then it extracted the image information to control iterative processes of four super-chaotic systems for making the random sequence associated with the plaintext,and used these random sequences to encrypt the permutation matrix by shuffling column-wise and row-wise. Simulation results show that compared with other color image encryption algorithm,this algorithm has higher security and larger key space,as well as strong key sensitive performance. This algorithm has high security,and it can meet the actual engineering requirements.

关 键 词：图像加密 多混沌系统 随机序列 密钥敏感性 抵抗攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]