混沌图象加密

Chaotic Image Encryption

离散时间动态系统Ｌｏｇｉｓｔｉｃ在一定参数范围内可以产生混沌运动，且其产生的混沌序列具有良好的伪随机特性．利用该系统产生的混沌序列对彩色图象进行加密和解密，在加密后的图象上，不存在原图中任何景物和轮廓；解密后的图象与原图完全一样．同时，通过比较，发现混沌序列对图象加密的效果优于周期序列．

Discrete time dynamic system Logistic map can generate chaotic phenomenon in a determine parameter range, and the chaotic sequences generated by the system have good statistic characteristic.We use the chaotic sequences to encry a colour image.Any scene and outline of the old image doesn′t exist in the encried image,and the deencried image is the same as the old image.Meanwhile,through comparing the image encrying effect,we find that chaotic sequences are superior to period sequences.