一种基于双混沌系统的军事图像加密算法  

A Military Image Encryption Algorithm Based on Two Chaotic Systems

作　　者：范继[1] 唐旭 舒立鹏[1] 周加永[1] 薛少辉 FAN Ji;TANG Xu;SHU Lipeng;ZHOU Jiayong;XUE Shaohui(Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712099,China)

机构地区：[1]西北机电工程研究所,陕西咸阳712099

出　　处：《火力与指挥控制》2022年第9期163-169,共7页Fire Control & Command Control

摘　　要：提出了一种基于双混沌系统的军事图像加密算法。利用二维耦合Logistic映射和Liu混沌系统初步设计了加密算法,算法分为置乱和扩散过程。在置乱阶段,利用两个混沌系统产生的混沌随机序列得到关联混沌序列,然后对明文进行置乱;在扩散阶段,根据两个混沌系统产生的混沌随机序列对置乱图像进行3次不同方式的扩散。仿真结果表明,提出的算法实用性强,对密钥具有敏感性,且能够有效抵抗密码分析,可以运用于军事图像的传输过程中。A military image encryption algorithm based on two chaotic systems is designed,which uses the two-dimensional coupled Logistic map and the Liu chaotic system,and the algorithm is divided into scrambling and diffusion process.In scrambling stage,the correlation of chaotic sequences is obtained by the chaos random sequence generated by the two chaotic systems,then we scramble the plaintext by the correlation of chaotic sequences to get the scrambled image.Afterwards,the scrambled image is diffused by the chaotic random sequence produced by the two chaotic systems for three times in the different ways.The simulation results show that the algorithm proposed in this paper has strong practicability,which is sensitive to keys,and effectively resist cryptanalysis.This image encryption algorithm can be effectively used in the transmission of military images.

关 键 词：二维耦合Logistic映射 LIU混沌系统 置乱和扩散 图像加密 

分 类 号：TN911.73[电子电信—通信与信息系统]