摘要
提出了一种针对大数据量数字图像空域复合加密/解密的方法。加密过程是借助Logistic混沌动力学系统过程既非周期又不收敛,且对初始条件敏感性,产生实数值混沌序列;再通过离散映射关系,把图像自带信息同实数值混沌序列耦合,生成参数序列;然后对图像的色度空间和像素位置分别进行置乱处理。解密算法即为加密的逆过程。其特点是:色度空间和像素位置的加密参数既依赖于密匙,又与每幅加密图像所携带的信息密切相关。大量的实验结果表明,此算法达到了令人满意的效果。
A new encrypting method related to still digital image,which bases on Logistic chaotic sequence is proposed in this paper.This computing method harnesses the randomicity and the sensitivity of the original value of the Logistic chaotic sequence,to generate the real value sequence,and then,create the parameter sequences through the discrete mapping.The encrypting process is disturbing color values of each image point and the array of original image separately based on those parameters.The decrypting process is just the reverse of the encrypting process.Finally,this new encrypting method shows great satisfaction in the result of experiment.
出处
《计算机与现代化》
2005年第1期66-69,共4页
Computer and Modernization
关键词
混沌序列
图像加密
置乱处理
加密参数
chaotic sequence
image encrypting
disorder processing
encrypting parameter
