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Journal of Electrical and Computer Engineering
Volume 2018, Article ID 8649294, 13 pages
https://doi.org/10.1155/2018/8649294
Research Article

Circuit Implementation, Synchronization of Multistability, and Image Encryption of a Four-Wing Memristive Chaotic System

School of Electrical and Automatic Engineering, Nanjing Normal University, Nanjing 210042, China

Correspondence should be addressed to Fuhong Min; nc.ude.unjn@gnohufnim

Received 18 July 2017; Revised 22 October 2017; Accepted 28 November 2017; Published 1 February 2018

Academic Editor: Ephraim Suhir

Copyright © 2018 Guangya Peng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The four-wing memristive chaotic system used in synchronization is applied to secure communication which can increase the difficulty of deciphering effectively and enhance the security of information. In this paper, a novel four-wing memristive chaotic system with an active cubic flux-controlled memristor is proposed based on a Lorenz-like circuit. Dynamical behaviors of the memristive system are illustrated in terms of Lyapunov exponents, bifurcation diagrams, coexistence Poincaré maps, coexistence phase diagrams, and attraction basins. Besides, the modular equivalent circuit of four-wing memristive system is designed and the corresponding results are observed to verify its accuracy and rationality. A nonlinear synchronization controller with exponential function is devised to realize synchronization of the coexistence of multiple attractors, and the synchronization control scheme is applied to image encryption to improve secret key space. More interestingly, considering different influence of multistability on encryption, the appropriate key is achieved to enhance the antideciphering ability.