摘要
近年来,人们提出了很多基于混沌理论的数字图像加密算法,但是其中有很大一部分采用传统的置乱-扩散体系,当攻击者通过选择明文攻击时,这种算法的安全性就大大降低.针对这个问题,提出了一种结合Logistic映射的变置乱参数的Arnold变换的图像加密算法,增加了置乱-扩散两个操作之间的关联性.仿真结果和数值分析表明,该算法具有密钥空间大,密钥敏感性强等特点,能够有效地抵抗统计攻击.
Recently,a variety of encryption algorithms of digital image based on chaos theory have been studied,but a large part of them adopt the traditional confusion-diffusion architecture,the security of which is greatly reduced when attacked by selecting plain-image.In this paper,to address this problem,we propose a algorithm through changing the parameters of Arnold transform combined with Logistic mapping,which increases the correlationof the two operations.Simulation results and numerical analysis show that the algorithms has a large key space,be sensitive of secret keys,which can be effective to resist statistical attack.
出处
《微电子学与计算机》
CSCD
北大核心
2015年第4期111-115,共5页
Microelectronics & Computer
基金
广东省重大科技专项(2012A080103010)
广东省重点实验室建设专项(2011A091000046)
粤港关键领域重点突破项目(2012A080107007)
