Design and FPGA implementation of encrypted frame transmission scheme based on chaotic reverse synchronization

Chaos exhibits significant characteristics, including pseudo-randomness and unpredictability. These properties render chaos a valuable tool in practical applications such as secure communication. Furthermore, chaos synchronization represents a crucial avenue of research within the field of chaos. The paper addresses the issue of the lack of flexibility and practicality associated with the synchronization method of discrete chaos synchronization control. To address the limitations of the discrete chaotic synchronization method, this paper proposes a novel approach to reverse synchronization of hyperchaotic Chen systems based on field-programmable gate arrays. This method offers a flexible and practical solution that can facilitate the direct implementation of discrete chaotic synchronization in real-world applications. Firstly, the dynamic behavior of the hyperchaotic Chen system is analyzed, and a reverse synchronization method for the hyperchaotic Chen system is proposed to advance the research of reverse synchronization theory and enhance the flexibility of controller design. Secondly, based on the synchronization scheme, an encrypted transmission scheme combined with frame synchronization was designed and implemented in FPGA for the first time, with the objective of improving the security of frame transmission. The experimental results demonstrate that the system is capable of precisely regulating the time synchronization between the sender and the receiver. Furthermore, the establishment of synchronization is rapid, and the transmission speed is considerable, which aligns with the practical requirements of the project.