基于Chen超混沌和DNA的彩色图像加密算法

Color Image Encryption Algorithm Based on Chen Hyperchaos and DNA

摘要:

为了提高图像在传输过程中的安全性，使得用户有更好的体验感，将Chen超混沌系统和DNA编码引入图像加密领域；彩色数字图像根据红、绿、蓝三个通道分为三个二维矩阵，并对三个二维矩阵进行DNA分区域编码处理，增加了编码运算的多样性，使得加密过程更加安全；由Chen超混沌系统生成的序列决定了每个二维矩阵的DNA编码解码规则和运算规则，按照相应规则进行加密，加密后由分段Logistic生成相应的序列再次进行行、列置换，分段的Logistic混沌映射可以让系统更快的进入混沌状态；合并红、绿、蓝三个通道的三个二维矩阵，生成三维矩阵，最终得到相应的彩色加密图像。选取相应的彩色图像进行仿真实验，最终的仿真结果表明，所提出的算法加密效果和相关性能指标良好，同时具有较强的安全性和鲁棒性。

Abstract:

In order to improve the security of images during transmission and provide users with a better experience, Chen hyperchaos system and DNA encoding are introduced into the field of image encryption; Color digital images are divided into three two-dimensional matrices based on the red, green, and blue channels, and DNA region encoding is performed on the three two-dimensional matrices to increase the diversity of encoding operations and make the encryption process more secure; The sequence generated by Chen's hyperchaotic system determines the DNA encoding, decoding, and operation rules of each two-dimensional matrix. It is encrypted according to the corresponding rules, and then segmented Logistic generates the corresponding sequence for row and column permutation. The segmented Logistic chaotic mapping can enable the system to enter the chaotic state faster; Merge the three two-dimensional matrices of red, green, and blue channels to generate a three-dimensional matrix, and ultimately obtain the corresponding color encrypted image. Select corresponding color images for simulation experiments, and the final simulation results show that the proposed algorithm has good encryption performance and related performance indicators, while also possessing strong security and robustness.