基于Logistic映射和超混沌系统的图像加密方案

A New Image Encryption Scheme Based on the Logistic Mapping and a Hyperchaotic System

利用Logistic映射和一个超混沌系统产生一个复杂的混沌时间序列,对图像进行置乱操作,重新排列图像的各像素,再进行两轮扩散操作,得到一个新的基于Logistic映射和超混沌系统的图像加密方案,并进行仿真实验和性能测试。实验证明,该加密方案有较好的密码学特性,能够对抗统计分析攻击、差分攻击等。

In this paper,we propose a new image encryption scheme which is based on the Logistic mapping and a hyper chaotic system.We use the logistic mapping and a hyper chaotic system to generate the chaotic time series of image scrambling,rearrange the pixels of an image,and then conduct two rounds of diffusion operation.The new encryption scheme is obtained.The simulation experiments were made and we can draw the conclusion that the new scheme has excellent cryptographic properties,which could resist statistic analysis attack and differential attack.