基于TD-ERCS混沌系统的多级图像加密

提出了一种基于TD-ERCS混沌系统的多级混沌图像加密方案：利用TD-ERCS混沌系统生成多组离散混沌序列,选择一组生成地址索引表对像素地址进行全局置乱;以一定方式反复从余下几组混沌序列中选择一组,取其一个字节与置乱后图像进行像素灰度值加密操作直至所有像素点均被加密为止.实验结果表明,该方案较好地掩盖了加密前后图像之间的关系,对一些分析、攻击方法具有较高的安全性.

Multistage Image Encryption Based on TD-ERCS Chaotic System

Due to the good properties of sensitivity,ergodic property and miscibility to initial conditions and parameters that chaos has and chaotic image encryption is a high efficient method,a multistage image encryption scheme was proposed based on Tangent Delay Ellipse Reflecting Cavity Map(TD-ERCS),which utilized TD-ERCS chaotic system to generate groups of discrete chaotic and chose one of groups to an address index list to scramble the positions of the image pixels in the spatial domain overall;then chose the remaining groups in a certain way to do the encryption operation byte by byte during the diffusion process of pixel values.The findings show that encryption scheme is good at concealing the relationship between the plain image and the encrypted image,and has high security to certain analysis and attack vectors.