一种基于像素奇偶性和tanh函数的图像加解密算法

An Image Encryption Algorithm Based on the Even or Odd Pixel and Tanh Mapping

本文提出了一种新的基于像素奇偶性和tanh变换的数字图像加密算法.算法利用二维logistic混沌映射生成二维随机序列,按照一定顺序重排后进行双曲正切变换,按照奇偶像素子序列与初始图像做异或运算,达到加密效果.仿真实验表明该算法操作简单,安全性高,是一种有效并值得推广的算法.

In this paper, a new image encryption algorithm based on the even or odd pixel and tanh transformation is proposed. Using 2D logistic mapping to generate stochastic seqt,ence, rearranging this sequence according to certain order and conducting xor operation with initial image after sequencing transformation according to the even or odd pixel,the encrypted image of this algurithm is obtained. It＇ s a simple and efficient algorithm with low computalional complexity and high salfety by theoretical analysis and sitnulation.