基于变参数的logistic混沌系统图像加密算法  

IMAGE ENCRYPTION OF LOGISTIC CHAOTIC SYSTEM BASED ON VARIABLE PARAMETERS

作　　者：赵耿[1,2] 李文健 马英杰 Zhao Geng;Li Wenjian;Ma Yingjie(Xidian University,Xi'an 710071,Shaanxi,China;Beijing Electronics Science and Technology Institute,Beijing 100071,China)

机构地区：[1]西安电子科技大学,陕西西安710071 [2]北京电子科技学院,北京100071

出　　处：《计算机应用与软件》2023年第12期325-331,共7页Computer Applications and Software

摘　　要：传统基于混沌的加密体制一般会使用固定的参数,对系统轨道的分析和破译使得算法的安全性不高。针对此类问题提出一种新的变参数logistic系统的图像加密算法,利用动态变换产生一组一直变化的logistic系统参数;用此系统产生一组随机序列,分别用于位置置乱和像素变换;双向扩散得到加密后的图像。算法经过仿真实现和性能测试,分析表明该算法能有效应对多种攻击手段,同时对密钥有高度敏感性,表明该算法具有较高的安全性和可靠性。Traditional encryption systems based on chaos generally use fixed parameters,and the analysis and deciphering of the system orbit makes the algorithm less secure.To solve such problems,a new image encryption algorithm of variable parameter logistic system is proposed.A set of changing logistic system parameters were generated by dynamic transformation,and then a set of random sequences were generated by this system,which were used for position scrambling and Pixel transformation.Two-way diffusion was used to get the encrypted image.The algorithm was implemented through simulation and performance testing.The analysis shows that the algorithm can effectively deal with a variety of attack methods,and it is highly sensitive to keys,which shows that the algorithm has high security and reliability.

关 键 词：变参数 logistic系统 混沌映射 图像加密 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]