摘要
在广义记忆元件数学模型的基础上,提出了一种忆阻时滞混沌系统并分析了该系统的基本动力学特性;基于该混沌序列设计了一种双重扩散的图像加解密方法,通过取模和位异或运算将第一次加密的结果运用到第二次加密的过程中,从而将明文图像在各个位置像素值的影响渗透到加密图像的所有像素中,能有效减少明文和密文间的联系.试验结果的直方图、相关性、密钥敏感性和抗噪声分析等验证了加密效果,表明了该方法的有效性和可行性.
Based on the mathematical model of generalized memristive devices,a memristive time-delay chaotic system was proposed and the basic dynamic characteristics of it was analyzed.A dual diffusion image encryption and decryption algorithm was designed based on the sequence of it.Through the nonlinear operations such as modulo and XOR,the plaintext,ciphertext and secret key were influenced mutually other,and the connection between plaintext and ciphertext was reduced effectively.Moreover,the effect of encryption was verified by the analysis of histogram,correlation,key sensitivity and antinoise attack.Correspondingly,the validity and feasibility of the algorithm were proved by the numerical results.
作者
林周彬
罗松江
高俊杰
LIN Zhoubing;LUO Songjiang;GAO Junjie(College of Automation, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China)
出处
《仲恺农业工程学院学报》
CAS
2021年第2期60-63,共4页
Journal of Zhongkai University of Agriculture and Engineering
基金
广东省大学生创新创业训练计划(201811347048)资助项目.
关键词
忆阻器
时滞混沌
图像加密
memristor
time-delay chaos
image encryption