基于混沌系统和动态DNA编码的彩色图像加密算法  

Color Image Encryption Algorithm Based on Chaos System and Dynamic DNA Encoding

作　　者：赵桥 李博[1] 项融融 ZHAO Qiao;LI Bo;XIANG Rongrong(Key Laboratory of Instruments and Dynamic Testing,Ministry of Education,Central North University,Taiyuan 030051)

机构地区：[1]中北大学仪器与动态测试教育部重点实验室,太原030051

出　　处：《计算机测量与控制》2024年第3期319-326,共8页Computer Measurement &Control

基　　金：国家自然科学基金(61471325);国家自然科学基金青年科学基金(52006114)。

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3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地进入混沌状态;合并红、绿、蓝3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。In order to improve the security of images during transmission and provide users with a better experience,the 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 the 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 the Chen 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 the segmented Logistic generates the corresponding sequence for row and column permutation,the segmented Logistic chaotic mapping can make the system to enter the chaotic state faster;The three two-dimensional matrices of red,green,and blue channels are merged to generate a three-dimensional matrix,and ultimately obtain the corresponding color encrypted image.The corresponding color images are selected to simulate the simulation experiments,and the final simulation results show that the proposed algorithm has good encryption performance and related performance indicators,which has a high security and robustness.

关 键 词：图像加密 信息安全 Chen超混沌系统 Logistic混沌系统 DNA编码 彩色图像 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]