基于两种置乱方式的混合混沌图像加密算法  

A Hybrid Chaotic Image Encryption Algorithm Based on Two Scrambling Methods

作　　者：陈云[1] 罗成 许璐 CHEN Yun;LUO Cheng;XU Lu(Naval University of Engineering,Wuhan Hubei 430033,China;Unit 91991 of PLA,Zhoushan Zhejiang 316000,China)

机构地区：[1]海军工程大学,湖北武汉430033 [2]中国人民解放军91991部队,浙江舟山316000

出　　处：《通信技术》2024年第9期925-933,共9页Communications Technology

基　　金：基础加强计划技术领域基金(2019-JCJQ-JJ-038)。

摘　　要：针对单一混沌系统产生的各伪随机序列之间存在关联性和单一置乱方法置乱效果不佳等问题,提出了一种DNA编码和Zigzag变换两种置乱方式相结合的混合混沌图像加密算法。通过离散的Logistic混沌映射和连续Chen超混沌系统生成混合的混沌伪随机序列,并结合DNA编码和Zigzag两种方法进行联合置乱和扩散,从而实现了混沌图像加密。由于该算法采用Zigzag和DNA编码两种方法进行联合置乱,并采用混合混沌伪随机序列对DNA编码规则和运算规则进行动态选取和控制,增强了置乱和扩散效果,可有效提升图像加密强度。通过仿真验证,并与其他文献进行对比,验证了所提算法的优良性能。Aiming at some problems such as correlation among each pseudo-random sequence generated by a single chaotic system and the poor scrambling effect of a single scrambling method,a hybrid chaotic image encryption algorithm combining two scrambling methods of DNA coding and Zigzag transform is proposed.A hybrid chaotic pseudo-random sequence is generated by discrete Logistic chaotic mapping and continuous Chen hyperchaotic system,and the chaotic image encryption is achieved by combining DNA coding and Zigzag transform for joint scrambling and diffusion.Since the algorithm adopts two methods of DNA coding and Zigzag transform for joint scrambling,and uses hybrid chaotic pseudo-random sequences to dynamically select and control the DNA coding rules and operating rules,it enhances the scrambling and diffusion effects,and can effectively improve the image encryption strength.Through simulation and comparison with other literatures,the excellent performance of the proposed algorithm is verified.

关 键 词：DNA编码 Zigzag变换 混沌 图像加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]