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Abstract：
In order to obtain chaos with a wider chaotic scope and better chaotic behavior, this paper combines the several existing one-dimensional chaos and forms a new one-dimensional chaotic map by using a modular operation which is named by LLS system and abbreviated as LLSS. To get a better encryption effect, a new image encryption method based on double chaos and DNA coding technology is proposed in this paper. A new one-dimensional chaotic map is combined with a hyperchaotic Qi system to encrypt by using DNA coding. The first stage involves three rounds of scrambling; a diffusion algorithm is applied to the plaintext image, and then the intermediate ciphertext image is partitioned. The final encrypted image is formed by using DNA operation. Experimental simulation and security analysis show that this algorithm increases the key space, has high sensitivity, and can resist several common attacks. At the same time, the algorithm in this paper can reduce the correlation between adjacent pixels, making it close to 0, and increase the information entropy, making it close to the ideal value and achieving a good encryption effect.
摘要：
为了获得更广泛的混沌范围和更好的混沌行为，本文结合现有的几种一维混沌，采用LLS系统的模块化运算，缩写为LLSS，形成了一个新的一维混沌映射。为了获得更好的加密效果，本文提出了一种基于双混沌和DNA编码技术的图像加密方法。将一种新的一维混沌映射与超混沌Qi系统结合使用DNA编码进行加密。第一阶段涉及三轮加扰；将扩散算法应用于明文图像，然后对中间密文图像进行分区。通过使用DNA操作形成最终的加密图像。实验仿真和安全性分析表明,该算法增加了密钥空间,灵敏度高,可以抵抗几种常见的攻击。同时,本文算法可以降低相邻像素之间的相关性,使其接近0，并增加信息熵，接近理想值,达到良好的加密效果。
