基于混沌系统的图像加密算法，先采用Arnold猫映射进行像素点位置置乱，然后对置乱后的图像的像素值进行Liu混沌加密或者Lorenz混沌加密。-Chaotic systems based on image encryption algorithm, first using Arnold cat map for the location of pixel scrambling, and then scrambling image pixel values Liu chaotic encryptio

数字签名及信息隐藏,实验源程序，包括说明文档，一看就明白-Digital signature and information hiding, experimental source, including a descr iption of documents, one look to understand