Design of a fractional-order chaotic secure communication circuit based on sliding mode theory and microcontroller

Abstract

Purpose

With the development of integrated circuit and communication technology, digital secure communication has become a research hotspot. This paper aims to design a five-dimensional fractional-order chaotic secure communication circuit with sliding mode synchronous based on microcontroller (MCU).

Design/methodology/approach

First, a five-dimensional fractional-order chaotic system for encryption is constructed. The approximate numerical solution of fractional-order chaotic system is calculated by Adomian decomposition method, and the phase diagram is obtained. Then, combined with the complexity and 0–1 test algorithm, the parameters of fractional-order chaotic system for encryption are selected. In addition, a sliding mode controller based on the new reaching law is constructed, and its stability is proved. The chaotic system can be synchronized in a short time by using sliding mode control synchronization.

Findings

The electronic circuit is implemented to verify the feasibility and effectiveness of the designed scheme.

Originality/value

It is feasible to realize fractional-order chaotic secure communication using MCU, and further reducing the synchronization error is the focus of future work.

Citation

Zhou, Z., Yu, W., Wang, J., Zhao, Y. and Liu, M. (2023), "Design of a fractional-order chaotic secure communication circuit based on sliding mode theory and microcontroller", Circuit World, Vol. 49 No. 4, pp. 480-492. https://doi.org/10.1108/CW-03-2021-0078