基于Baker映射迭路的图像加密算法  

Encryption Algorithm Based on the Itinerary of Baker Map

作　　者：叶瑞松[1] 庄乐仪[1] 

机构地区：[1]汕头大学数学系,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2010年第1期54-60,共7页Journal of Shantou University：Natural Science Edition

摘　　要：提出一种基于Baker映射迭路的数字图像空间域的编码新方法,利用Baker映射迭路所得的有限符号串对图像像素位置编码,从而对数字图像进行置乱,并计算置乱周期和置乱度.在此基础上,利用Logistic映射的混沌性质对置乱图像作了进一步的加密.A novel digital image encoding approach based on the itinerary of Baker map in spatial domain is proposed, it uses the finite character strings generated by the itinerary of Baker map to encode the pixels＇ positions so as to scramble the image. The periods and scrambling degrees of the algorithm are calculated as well. Furthermore, the chaotic characteristics of the Logistic map are applied to encrypt the scrambled image.

关 键 词：BAKER映射 迭路 置乱 加密 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]