DNA运算与超混沌系统新型图像加密算法

DNA operation and new image encryption algorithm for hyper-chaotic system

由于传统图像加密的安全性有一定的局限,本文提出了一种以DNA计算、超混沌系统和哈希函数为基础混合模型的新型图像加密算法。该方法由DNA水平排列和扩散组成。DNA水平排列基于Logistic map的映射函数应用于DNA图像,来改变DNA图像中元素所处的位置;而DNA水平扩散则定义两个新的代数DNA计算规则,称为DNA循环移位,使用了多种DNA计算规则,将置换后的DNA图像与密钥DNA图像进行扩散处理,再进行图像加密。实验表明,所提出的图像加密方案具有良好的加密效果。

The security of traditional image encryption is limited,so a new image encryption algorithm based on DNA computing,hyper-chaos system and hash function is proposed.The proposed scheme consists of horizontal arrangement and diffusion of DNA.DNA horizontal arrangement is based on the Logistic-map mapping function applied to the DNA image to change the position of elements in the DNA image.For horizontal DNA diffusion,two new algebraic DNA calculation rules are defined,which are called DNA cyclic displacement.We use a variety of DNA calculation rules.Firstly,the displaced DNA image is diffused with the key DNA image,and then the image is encrypted.Experimental analysis shows that the proposed image encryption scheme has good encryption effect.