基于混沌符号动力学的图像加密电路研究  

Image encryption circuit with chaotic symbol dynamics

作　　者：王金铭[1] 王章权[1] 

机构地区：[1]浙江树人大学信息科技学院,浙江杭州310015

出　　处：《电路与系统学报》2011年第2期122-129,共8页Journal of Circuits and Systems

基　　金：浙江省教育厅2008年度科研计划项目(Y200803013)

摘　　要：结合混沌符号动力学原理及单驱动恒流源混沌电路1-D分段线性映射混沌系统,本文经过理论论证并提出了一种能够实现数字图像加密的像素位和像素值的置乱算法。该算法利用混沌符号动力学原理,仅利用一个有限长度的密钥参数便可完成多密钥的置乱加密过程,而且能同时完成像素位和像素值的不同密钥加密,大大加强了密钥的搜索空间,增强了抗破解的能力。实验结果显示,本算法具备实现简单,加密速度快,加密效果好等特点,可广泛应用于图像的加密传输,数字水印等隐蔽传输中的加密处理,有较好的实用前景。A circuit to realize the image encryption with 1-D piece-wise chaotic symbol dynamics is proposed.Based on the algorithm of chaotic symbol dynamics,some different longer chaotic bit sequences could be got from only one shorter chaotic sequence with addition、subtraction、multiplication and division modules.According to the theory of linear algebra,a primary matrix is formed by interchanging the rows of an identity matrix.To realize the image encryption,the encryption algorithm uses the chaotic sequence to determine the algorithm of interchanging the rows,then uses the primary matrix which is determined by the different chaotic sequence to scramble the position and the value of each pixel.Experimental result shows that the algorithm is good at the image scrambling.It is expected to be applied into the image encryption transmission or preprocessing of secret images in digital watermarking.

关 键 词：混沌 符号动力学 混沌电路 图像置乱 

分 类 号：TN710[电子电信—电路与系统]