系统仿真学报 ›› 2019, Vol. 31 ›› Issue (5): 984-991.doi: 10.16182/j.issn1004731x.joss.17-0170

• 仿真应用工程 • 上一篇    下一篇

一个新忆阻混沌系统及其在图像加密中的应用

屈双惠1, 杨志宏2, 容旭巍2, 吴淑花1   

  1. 1.石家庄学院物理学院,河北 石家庄 050035;
    2.石家庄学院机电学院,河北 石家庄 050035
  • 收稿日期:2017-04-20 修回日期:2017-07-21 出版日期:2019-05-08 发布日期:2019-11-20
  • 作者简介:屈双惠(1978-),女,河北石家庄,硕士,副教授,研究方向为非线性系统;杨志宏(1978-),男,河北玉田,硕士,讲师,研究方向为图像加密。
  • 基金资助:
    河北省自然科学基金(F2013106079),石家庄学院科研平台建设成果(XJPT002)

A New Memristor Chaotic System and Its Application in Image Encryption

Qu Shuanghui1, Yang Zhihong2, Rong Xuwei2, Wu Shuhua1   

  1. 1. School of Physics, Shijiazhuang University, Shijiazhuang 050035, China;
    2. School of electromechanical engineering, Shijiazhuang University, Shijiazhuang 050035, China
  • Received:2017-04-20 Revised:2017-07-21 Online:2019-05-08 Published:2019-11-20

摘要: 通过引入离子迁移忆阻器对原Chen系统的状态方程进行了变换,构建了一个新系统,并对新系统的分岔图、李雅普诺夫指数谱等动力学特性进行了分析,结果表明新系统确实具有混沌特性。将新的忆阻混沌系统应用于图像加密技术,能够生成安全指数更高的密钥系统。采用双重扩散加密的方法,使明文与密文之间没有直接联系,将明文在各个位置像素值的影响渗透到密文的所有像素,提高了密文对明文的敏感性,促进了混沌系统在保密通信中的应用。

关键词: 离子迁移忆阻器, 混沌系统, 动力学特性, 图像加密

Abstract: A new memristor chaotic system is designed by the method of bringing an ion migration memristor into the Chen system equation. The basic dynamic characteristics of the memristive system are investigated via bifurcation, Lyapunov exponent et al, which proves the validity of the new system. The new memristor system is applied in the image encryption to improve the security of the encryption key. A dual encryption algorithm is used, which makes every pixel value of plaintext influence all pixel values of ciphertext. Although there is no direct link between plaintext and ciphertext, the sensibility of ciphertext varying with plaintext can be improved. The result improves the application in message encryption based on complex system.

Key words: ion migration memristor, chaotic system, dynamic properties, image encryption

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