基于仿射密码的并行图像加密算法  

Parallel image encryption algorithm based on affine cipher

作　　者：柯琦[1] 张福元[2] 李爱泉 廖琪男[1] KE Qi;ZHANG Fuyuan;LI Aiquan;LIAO Qinan(Department of Computer,Guangxi University of Finance and Economics,Nanning 530003,China;Public Security Department of Guangxi Zhuang Autonomous Region,Nanning 530028,China)

机构地区：[1]广西财经学院计算机系,广西南宁530003 [2]广西壮族自治区公安厅,广西南宁530028

出　　处：《现代电子技术》2018年第22期178-181,共4页Modern Electronics Technique

基　　金：国家自然科学基金(61562004);广西教育科学"十三五"规划课题(2017C414);广西财经学院青年教师科研发展基金项目(2017QNB1)~~

摘　　要：为了提高加密系统密钥安全性,获得更好的扩散性能,提高算法运行效率,提出一种基于仿射密码的并行图像加密算法。利用Lorenz混沌序列对像素位置进行置乱;引入古典密码学中的仿射密码进行像素值扩散和像素值混淆;利用多核计算机多个核心并行计算,将图像分块后并行加密。实验结果表明,仿射加密算法密钥空间大、安全性强、扩散性和扰乱性效果好、算法运行效率高,且仿射密码加密比异或加密扩散效果更好。A parallel image encryption algorithm based on the affine cipher is proposed to improve the key security of the encryption system,obtain better diffusion performance,and improve the running efficiency of the algorithm.The Lorenz chaos sequence is used to scramble pixel positions.The affine cipher in classical cryptograph is introduced to diffuse and confuse pixel values.The multi-core parallel computing of the multi-core computer is adopted to divide images into blocks for parallel encryp-tion.The experimental results show that the affine encryption algorithm has large key space,strong security,good diffusion and disturbance performances,and high operation efficiency,and the affine cipher encryption has a better diffusion effect than the XOR encryption.

关 键 词：仿射密码 图像加密 像素扩散 像素混淆 并行计算 多核计算机 

分 类 号：TN911.73-34[电子电信—通信与信息系统] TP309[电子电信—信息与通信工程]