Visible to the public Impact of multipath reflections on secrecy in VLC systems with randomly located eavesdroppers

TitleImpact of multipath reflections on secrecy in VLC systems with randomly located eavesdroppers
Publication TypeConference Paper
Year of Publication2018
AuthorsCho, S., Chen, G., Chun, H., Coon, J. P., O'Brien, D.
Conference Name2018 IEEE Wireless Communications and Networking Conference (WCNC)
Keywordsfree-space optical communication, Geometry, legitimate information, legitimate user, light emitting diode configuration, light emitting diodes, light reflection, Metrics, Monte Carlo methods, Monte Carlo simulations, multipath reflections, optical receivers, optical transmitters, physical layer security, PLS, probability, pubcrawl, randomly distributed eavesdroppers, randomly located eavesdroppers, reflected light, reflection, Resiliency, Scalability, secrecy outage probability, secrecy viewpoint, Signal to noise ratio, Stimulated emission, stochastic geometry, telecommunication security, visible light communication, Visible Light Communications Security, VLC systems
AbstractConsidering reflected light in physical layer security (PLS) is very important because a small portion of reflected light enables an eavesdropper (ED) to acquire legitimate information. Moreover, it would be a practical strategy for an ED to be located at an outer area of the room, where the reflection light is strong, in order to escape the vigilance of a legitimate user. Therefore, in this paper, we investigate the impact of multipath reflections on PLS in visible light communication in the presence of randomly located eavesdroppers. We apply spatial point processes to characterize randomly distributed EDs. The generalized error in signal-to-noise ratio that occurs when reflections are ignored is defined as a function of the distance between the receiver and the wall. We use this error for quantifying the domain of interest that needs to be considered from the secrecy viewpoint. Furthermore, we investigate how the reflection affects the secrecy outage probability (SOP). It is shown that the effect of the reflection on the SOP can be removed by adjusting the light emitting diode configuration. Monte Carlo simulations and numerical results are given to verify our analysis.
Citation Keycho_impact_2018