基于混沌的彩色图像加密算法研究

Color Image Encryption Algorithm Based on Chaos

利用混沌信号的优良特性,结合彩色位级图像的内在特点,提出了一种新的彩色图像混沌加密算法。首先将彩色图像的RGB三基色分别划分为8幅位级图像并将其作为一个整体,利用超混沌系统生成混沌序列,进行位级图像置乱,然后利用Logistic混沌序列进行图像像素扩散,最后进行仿真测试和性能分析,结果表明所提算法具有较强的安全性和有效性。

A new chaotic encryption algorithm of color images is presented based on the properties of chaotic sequences and inherent characteristics of color bit-level images. At first, the plain RGB color image is divided into 8 bit-level images respectively which are treated as a group. Next the bit-level image group is permutated using chaotic sequences generated by hyper-chaotic system. Then the image pixel-level diffusion is carried on using logistic chaotic sequences. Finally,experiments are carried out to justify the superior security and effectiveness of the proposed algorithm.