基于m序列变换和混沌映射的图像加密算法  

Image Encryption Algorithm Based on m-Sequence Transform and Chaos Map

作　　者：刘家胜[1] 黄贤武[2] 朱灿焰[2] 吕皖丽[1] 

机构地区：[1]安徽大学计算机科学技术学院,合肥230039 [2]苏州大学电子信息学院,苏州215021

出　　处：《电子与信息学报》2007年第6期1476-1479,共4页Journal of Electronics & Information Technology

基　　金：江苏省自然科学基金(BK2001137);安徽省高校青年教师基金(2004jq107)资助课题

摘　　要：该文利用m序列发生器中移位寄存器状态的遍历性(全零状态除外),首次提出一种“m序列变换”用于图像位置置乱的方法。并利用混沌映射系统具有初值敏感性,参数敏感性和类随机性的特点,设计了一种基于“m序列变换”与混沌映射相结合的图像加密算法,与其它图像加密算法相比,该算法的密钥空间非常巨大,具有更好的安全性。Based on the ergodicity of the shifters （except for all zero-states） in m-sequence generator, in this paper a new ＂m-sequence transform＂ method is first proposed to apply to image position permutation. Combining this method with chaotic map, a novel image encryption approach is presented, and some simulating results are shown in this paper. Comparing with the existing encryption methods, the approach is not only of the characteristics of chaotic map with initial value sensitivity, parameter sensitivity and random sensitivity, but also of more larger secret key space, Thus the approach is more security than other encryption methods.

关 键 词：图像加密 m序列变换 混沌映射 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]