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Article

Challenges in Physical Layer Security for Visible Light Communication Systems

1
Department of Electrical Engineering, Korea Military Academy, Seoul 01815, Korea
2
5GIC&6GIC, Institute for Communication Systems (ICS), University of Surrey, Guildford GU2 7XH, UK
3
Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Christos Bouras
Network 2022, 2(1), 53-65; https://doi.org/10.3390/network2010004
Received: 18 December 2021 / Revised: 11 January 2022 / Accepted: 19 January 2022 / Published: 20 January 2022
This article highlights challenges associated with securing visible light communication (VLC) systems by using physical layer security (PLS) techniques. Motivated by the achievements in PLS studies for radio frequency (RF) communication, many PLS techniques for VLC systems were also rigorously investigated by tailoring the RF techniques to the VLC environment. However, careful consideration of the inherent differences between RF and VLC systems is still needed. By disregarding these differences, an eavesdropper could be given an opportunity to wiretap the VLC systems, even when PLS techniques are employed to protect them. Crucially, the fact that it is often not possible to know the number and locations of eavesdroppers in real VLC systems may allow eavesdroppers to devise various cooperative eavesdropping methods. By examining a few examples of the possible eavesdropper threats that can occur in VLC systems, this article offers novel insights into the vulnerabilities of state-of-the-art PLS schemes for VLC systems. Although the focus of the paper is mostly on these weaknesses, some potential solutions are also briefly proposed with a view to stimulating discourse in the community. View Full-Text
Keywords: physical layer security; visible light communication; beamforming; secrecy capacity; secrecy outage probability physical layer security; visible light communication; beamforming; secrecy capacity; secrecy outage probability
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MDPI and ACS Style

Cho, S.; Chen, G.; Coon, J.P.; Xiao, P. Challenges in Physical Layer Security for Visible Light Communication Systems. Network 2022, 2, 53-65. https://doi.org/10.3390/network2010004

AMA Style

Cho S, Chen G, Coon JP, Xiao P. Challenges in Physical Layer Security for Visible Light Communication Systems. Network. 2022; 2(1):53-65. https://doi.org/10.3390/network2010004

Chicago/Turabian Style

Cho, Sunghwan, Gaojie Chen, Justin P. Coon, and Pei Xiao. 2022. "Challenges in Physical Layer Security for Visible Light Communication Systems" Network 2, no. 1: 53-65. https://doi.org/10.3390/network2010004

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