摘要
图像置乱算法Arnold cat变换存在密钥量小和通用性差的缺点,为此,从图像置乱的实质出发,提出均匀置乱的概念,并对Arnold cat变换进行了改进,提出图像位置均匀置乱算法。实验结果表明,新算法密钥量显著提高,置乱效果理想,同时可以抵抗剪切攻击。
Arnold cat transformation is widely applied and has the best scrambling effect. However,it has some disadvantages,such as small key quantities and poor generalizability. From the scrambling essential,the concept of even scrambling was presented. At the same time,an algorithm of image position scrambling on the basis of improving Arnold cat transformation was put forward. The experimental results show that the key quantities and scrambling effect of the proposed algorithm are improved obviously,and it can resist cut attack.
出处
《计算机应用》
CSCD
北大核心
2009年第11期2960-2963,共4页
journal of Computer Applications
基金
国家"948"计划资助项目(2005-4-62)
教育部春晖计划项目(Z2007-1-15014)
关键词
图像加密
位置置乱
相关系数
image encryption
position scrambling
related coefficient
