基于位平面和保守混沌系统的图像加密算法  

Image encryption algorithm based on the bit plane and conservative chaotic system

作　　者：王思淼 杜宝祥[1] 彭琪琪 WANG Simiao;DU Baoxiang;PENG Qiqi(College of Electronic Engineering,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学电子工程学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2022年第5期613-620,共8页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(61801173)。

摘　　要：在科技发展的时代,实时通信已经成为必不可少的交流手段,信息安全成为人们担心的问题。目前,大部分混沌图像加密算法都是基于耗散系统,密码破译者可利用耗散系统的混沌吸引子进行分析破译。本文提出了基于位平面和保守混沌系统的图像加密算法,该算法将保守混沌系统进行迭代,得到五维的伪随机序列,升序排列后生成索引矩阵并用其对伪随机序列进行置乱,得到新的五维序列后,再分别用五维序列进行位平面行列置乱、异或运算和像素级置乱。通过安全性分析和利用Matlab进行数据仿真,可以看出本算法具有良好的加密效果。In the era of technological development,real-time communication has become an indispensable means of communication for people.Information security has also become a concern for people.At present,most chaotic image encryption algorithms are based on dissipative systems,and cryptographers may use the chaotic attractors of dissipative systems for analysis and deciphering.In order to improve the security of images in communication,an image encryption algorithm based on bit plane and bit plane and conservative chaotic system is proposed.The algorithm iterates the five-dimensional chaotic system to obtain a five-dimensional pseudo-random sequence.After sorting in ascending order,an index matrix is generated and used to scramble the pseudo-random sequence.After the new five-dimensional sequence is obtained,the five-dimensional sequence is used to perform bit-plane row and column scrambling,XOR operation,and pixel-level scrambling.Safety analysis is also carried out.After simulation with Matlab,it can be seen from the results of histogram,correlation and information entropy that this algorithm has a good encryption effect.

关 键 词：图像加密 混沌系统 位平面 保守系统 

分 类 号：TN309.7[电子电信—物理电子学]