基于Chen混沌映射的位平面图像加密方法  

Image Encryption Method Based on Chen Chaos Mapping and Bit Plane

作　　者：彭平[1] 孙立新 王铁柱[3] 

机构地区：[1]河北中医学院公共课教学部,河北石家庄050001 [2]河北省疾控中心药械处,河北石家庄050001 [3]河北中医学院信息技术中心,河北石家庄050001

出　　处：《数学的实践与认识》2015年第3期117-123,共7页Mathematics in Practice and Theory

基　　金：河北省科技计划基金(092300410211)

摘　　要：将Chen混沌映射和位平面交换策略结合在一起,构建了一种全新的图像加密方法.首先,基于Chen映射构造X、Y、Z三个方向上的混沌序列.其次,分别在第一、三、五次加密过程中用三个Chen序列对图像施加混沌映射,在第二、四次加密过程中对图像位平面进行首尾交换和相邻交换.实验结果表明,加密方法可以获得的较低关联度的加密结果,对密钥敏感并且执行速度快.Chen chaos mapping and bit plane switching strategy are combined together to build a new image encryption method. First of all, X, Y, and Z chaotic sequence are structured by using Chen mapping. Then, three chaotic sequences are applied to image respectively in the first, third, and fifth encryption process, and both exchange and adjacent exchange of bit plane are used in the second and fourth encryption process. Experimental results show that the proposed encryption method is fast and sensitive to the key, and it can obtain low correlation on encryption results.

关 键 词：混沌映射 位平面 图像加密 关联度 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]