基于Hénon映射与魔方变换的图像加密算法

摘要

We propose an image encryption algorithm,it is based on improved Hénon mapping and magic cube transformation,makes use of improved Hénon mapping sequence to have more ideal statistical and distribution properties,and is more suitable for image encryption.The algorithm first changes the pixels value of image by carrying out XOR operation on them using obtained integer sequence,and then decompose the image into a 3-dimensional matrix,finally,makes the cyclic shift operation on data of each plane by rings along with every axis in 3-dimensional space,that is,uses magic cube rotation transformation to complete image data scrambling.The encryption algorithm has the advantages of low computational cost,large key space,and applicable to all kinds of images.Simulation experimental results show that the algorithm has good image encryption effect,and has quite strong anti-interference capability against common attacks.%提出一种基于改进的Hénon映射与魔方变换的图像加密算法。该加密算法采用改进的Hénon映射序列，使其具有更为理想的统计与分布特性，更适用于图像加密。算法首先利用获得的整数序列与图像的像素值运算而使其改变，再将图像分解为三维数据矩阵，在三维空间沿每一轴向对各平面中的数据按环作循环移位操作，即采用魔方旋转变换完成对图像数据的置乱。该加密算法具有运算量低、密钥空间大与图像普适性等优点。仿真实验结果表明该算法具有良好的图像加密效果，对于常见的攻击具有较强的抗干扰能力。