一种新的基于混沌序列的图像分块加密方法

A New Image Blocking Encryption Arithmetic Based on Chaotic Sequences

给出一种新的图像置乱加密算法并进行实验验证.首先给定一对初始值和参数,以此作为密钥生成混沌序列及其主遍历矩阵,把一幅较大的图像分解为适当大小的图像子块,根据混沌序列的主遍历矩阵,对图像子块进行置乱;然后再选择另一对初始值和参数,生成一个新的混沌序列及其主遍历矩阵,以该主遍历矩阵对图像的每个子块进行置乱加密;最后,把加密后的图像隐藏到一幅适当的载体图像中.

A new image encryption algorithm was presented.First,a given initial value and a parameter as password were used to generate a Chaos sequences and its ergodic matrix,and the original image was divided into small blocks of suitable size which were scrambled by the ergodic matrix.Then another given initial value and parameter were used to scramble each of the blocks in the same way.Then the encrypted image was embedded in a suitable image.Experiment results showed that the algorithm was effective and useful.