Biosignals Secure Communication Scheme With Filtering of Active Control Projection Synchronization of Biological Chaotic Circuits With Different Orders Based on DNA Strand Displacement.

The emergence of DNA strand displacement (DSD) biocomputing has facilitated the development of chaotic synchronous and secure communication. The biosignals secure communication based on DSD has been implemented through coupled synchronization in previous works. In this article, the active controller based on DSD is constructed to achieve projection synchronization of biological chaotic circuits with different orders. The filter based on DSD is designed to filter noise signals in biosignals secure communication system. Firstly, the four-order drive circuit and the three-order response circuit are designed based on DSD. Secondly, an active controller is constructed based on DSD to implement projection synchronization of biological chaotic circuits with different orders. Thirdly, three kinds biosignals are designed to implement encryption and decryption of secure communication system. Finally, the low-pass resistive-capacitive (RC) filter is designed based on DSD to implement noise signals treatment during the processing reaction. The dynamic behavior and synchronization effect of biological chaotic circuits with different orders are verified by visual DSD and MATLAB software. The effect of biosignals secure communication is demonstrated by encryption and decryption of the signals. The effectiveness of the filter is verified by processing the noise signal in the secure communication system.