基于混沌置乱与DNA计算的彩色图像加密算法  

Color Images Encryption Algorithm Based on Chaotic Scramblingand DNA Computing

作　　者：赵凤[1] ZHAO Feng(Department of General Education,Anhui Xinhua University,Hefei 230088,China)

机构地区：[1]安徽新华学院通识教育部,合肥230088

出　　处：《德州学院学报》2020年第4期21-26,34,共7页Journal of Dezhou University

基　　金：安徽新华学院校级自然科学研究重点项目(2018zr001,2019zr005).

摘　　要：针对彩色图像数据存储量大的特点,为了增强密钥流的随机性、扩展密钥空间、提高安全性,提出一种基于混沌置乱和DNA计算的加密方案.该算法首先利用Hénon混沌系统产生的序列对图像分块置乱,然后对子块重新组合后的图像进行DNA编码,根据R、G、B三个通道分解成三个DNA序列;再利用Qi超混沌产生的四个序列对DNA序列进行深度位置置乱和像素扩散,最后将三个DNA序列逐个取补得到的序列变换DNA编码规则进行解码得到加密图像.实验仿真表明,该方案能有效的抵御已知明文攻击、差分攻击、统计攻击,安全性高.In order to enhance the randomness of the key flow,expand the key space,and improve the security of the color image,an encryption scheme based on chaotic scrambling and DNA computation is proposed.Firstly,the image is scrambled by the sequence generated by Hénon chaotic system,and then the recombined image is encoded by DNA,which is decomposed into three DNA sequences according to three channels.The four sequences generated by Qi hyperchaos are then scrambled for depth position scrambling and pixel diffusion,and the sequence transformation encoding rules obtained by complement of the three sequences are decoded to obtain the encrypted image.Experimental simulation shows that this scheme can effectively resist known plaintext attacks,differential attacks,statistical attacks,and has high security.

关 键 词：图像加密 DNA序列 Hénon混沌系统 Qi超混沌系统 彩色图像 

分 类 号：TP918[自动化与计算机技术]