激光技术2017，Vol.41Issue(6)：897-903,7.DOI:10.7510/jgjs.issn.1001-3806.2017.06.026
一种基于混沌映射的快速图像加密算法优化
Optimization of fast image encryption algorithm based on chaotic mapping
摘要
Abstract
In order to solve the rapid increase of the encryption time because of the increasing image size in the existing image encryption algorithm , the optimized encryption algorithm based on logistic and Arnold mapping was used to achieve the optimization of the fast image encryption algorithm.The algorithm was based on two kinds of chaotic maps to the original image , pixel scrambling and gray value substitution.Pixel scrambling was to select the H adjacent pixels according to the image size , appropriately adjust the H value and realize the encryption time optimization.Gray value substitution is to generate chaotic sequences by Arnold mapping , operate the scrambling image and get the cipher image.The results show that , for 256 ×256 Lena standard images, the encryption time is reduced to 0.0817s.The algorithm has advantages of large key space and fast encryption speed, and can effectively resist the attack of exhaustive , statistical, and differential means.关键词
图像处理/图像加密/混沌映射/Lena图像Key words
image processing/image encryption/chaotic mapping/Lena image分类
信息技术与安全科学引用本文复制引用
乔建平,邓联文,贺君,廖聪维..一种基于混沌映射的快速图像加密算法优化[J].激光技术,2017,41(6):897-903,7.基金项目
湖南省科技计划资助项目(2015JC3041) （2015JC3041）
