基于加密混沌矩阵组的图像加密算法

针对Logistic映射的短周期问题以及单纯混沌加密复杂性不高的缺点,提出一种基于加密混沌矩阵组的图像加密算法。该算法利用Hybrid映射产生周期扩大M倍的二值混沌序列,根据密钥生成加密混沌矩阵组,对图像位平面做置换加密,为进一步算法提高抵抗统计分析攻击的能力,对置换加密后的图像再进行基于队列变换的图像置乱。实验表明,该算法克服了Logistic混沌映射的短周期问题和单纯混沌加密复杂度不高的问题,能够抵御多种攻击,具有良好的安全性。

Image Encryption Algorithm Based on Sorted Encryption Chaotic Martix of Hybrid

This paper proposes an image encryption algorithm based on sorted encryption chaotic matrix of Hybrid, which mainly aims at the short period of Logistic mapping and the comparatively low complexity of chaotic encryption. The algorithm uses the Hybrid mapping to produce a binary chaotic sequence, of which the period is extended to M-times, then generates the Sorted Chaotic Martix of Encryption, which is used to implement substitution encryption on the bit plane of the image. Then the substituted image is encrypted based on the method of queue transformation in order to raise its resistability to the interrlated attack. The experiment shows that the algorithm overcomes the flaws of the short period of Logistic mapping and of the comparatively low complexity of chaotic encryption, and is of strong resistability to various attacks and excellent security.