摘要
针对数字图像的加密置乱问题,利用将图像连续两次分块并分别执行块置乱和像素置乱的二重操作方法,给出数字图像的二重置乱算法。得到的置乱效果相对于传统的仿射变换,具有密钥数量大、置乱效果好、抗统计分析攻击能力强等特点。有效解决了传统二维仿射变换置乱效果较差、效率低等问题。
Aiming at the problem of digital image encryption and scrambling,a binary reset algorithm of digital image is given by using the double operation method of dividing the image into two blocks and performing block scrambling and pixel scrambling respectively.Compared with the traditional affine transformation,the obtained scrambling effect has the characteristics of large number of keys,good scrambling effect,and strong resistance to statistical analysis and attack.It effectively solves the problems of poor scrambling effect and low efficiency of the traditional two-dimensional affine transformation.
作者
丁永胜
张水胜
DING Yong-sheng;ZHANG Shui-sheng(Department of Information and Computing Sciences, School of Science, Qiqihar Unviersity, Qiqihar Heilongjiang 161006,China)
出处
《佳木斯大学学报（自然科学版）》
CAS
2020年第2期45-47,共3页
Journal of Jiamusi University：Natural Science Edition
基金
黑龙江省教育厅项目(135209247)。
关键词
数字图像
仿射变换
分块置乱
图像加密
digital image
affine transformation
block scrambling
image encryption
