用logisitic映射生成混沌密码流，对密码流排序后生成置换地址集合，用这个地址集合对图像像素点进行重新排列，从而达到置乱的目的。-Chaotic Cipher stream generated with logisitic mapped to generate replacement address password flow sorted collection, the collection of this address to rearrange the image pixels, so as to achieve the purpose of scrambling.