基于Logistic混沌序列的数字图像加密研究

离散的Logistic映射对初值和结构参数的改变具有极端的敏感性,在一定条件下能够产生混沌,并且产生的混沌序列具有类白噪声统计特性等特点。同时利用数字图像本身的特点和人类视觉系统的特性,先对原始图像进行压缩,再用混沌序列进行加密和传输图像,这样不仅可以减少存储空间,还可以提高加密和传输效率。该文基于以上特性提出了一个新的基于Logistic混沌序列的数字图像加密算法,仿真实例证明该算法是有效、可行的,而且具有较高的安全性。

A Research of Digital Image Encryption Based on Logistic Chaotic Sequence

A digital image encryption algorithm based on Logistic chaotic sequence is presented to make use of its properties,such as sensitivity on their initial conditions and parameters of the map,good statistic characteristic.And due to the characteristic of digital image and HVS,people compress the image and then use chaotic sequence to encrypt ,it can not only lessen the storage space,but also increase the efficiency of encryption and transmission.This paper presents a new encryption algorithm based on Logistic chaotic sequence,and the experiment illustrates the proposed method is good performance and the encrypted images have high security.