基于多混沌系统的图像加密算法  

Image encryption algorithm based on multiple chaotic systems

作　　者：刘海峰 周雪飞 梁星亮 汪丽华 LIU Hai-feng;ZHOU Xue-fei;LIANG Xing-liang;WANG Li-hua(College of Arts and Sciences, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学文理学院,陕西西安710021

出　　处：《陕西科技大学学报》2022年第1期188-195,共8页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(12001345)。

摘　　要：针对信息传输过程中图像信息容易被窃取、篡改等恶意破坏的问题,构建一个新的超Chen混沌系统,并将其与二维Chebyshev-Sine混沌系统相结合,提出了一种新的图像加密算法.该算法首先对明文图像像素坐标位置进行Arnold变换,其次将超混沌序列应用于图像的扩散,最后运用二维Chebyshev-Sine混沌映射产生的混沌序列对扩散后的图像进行分块扩散与置乱,获得最终加密图像.对实验结果经多方面分析得出该算法的密钥空间大,且可以有效抵御多种恶意攻击,有足够的安全性.Aiming at the problem that the image information is easy to be stolen,modified and deleted in the process of information transmission,a new improved hyper Chen chaotic system is constructed,which is combined with the two-dimensional Chebyshev-Sine chaotic system,and a new image encryption algorithm is proposed.Firstly,Arnold transformation was performed on the pixel coordinates of the plaintext image.Secondly,the hyperchaotic sequence is used to diffuse the scrambled image.Finally,the chaotic sequence generated by the two-dimensional Chebyshev-Sine chaotic mapping is used to divide the image into blocks and then diffuse and scramble the image to obtain the final encrypted image.The experimental results show that the algorithm has large key space,and can resist multiple malicious attacks effectively,with sufficient security.

关 键 词：超Chen混沌系统 ARNOLD变换 2D Chebyshev-Sine混沌系统 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]