Application of analog electronic circuits in secure communication: A review

Abstract

In recent times, secure communication has been one of the most exciting areas of research, and many analog electronics circuits have been found to be useful in this area. In this paper, different types of analog circuits exhibiting nonlinear dynamics have been reviewed. It has been shown that such circuits can generate signals which have frequency spectrum characteristics similar to noise. This leads to an important conclusion that a low-cost spread spectrum-based secure communication model can be developed using analog circuits. A few of the secure communication models developed using these analog circuits have also been reviewed. It is expected that this paper would enable readers to explore more analog circuits which can be used in secure communication in a better way.