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Physical layer security in light-fidelity systems.

Zhenyu Zhang1, Anas Chaaban1, Lutz Lampe2

  • 1School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|March 3, 2020
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Summary

Light-fidelity (LiFi) offers secure indoor wireless communication. This study explores LiFi physical layer security (PLS), comparing it to radio-frequency (RF) PLS and investigating methods like beamforming to enhance data protection against eavesdropping.

Keywords:
intensity modulationsecrecy ratewiretap channel

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Area of Science:

  • Optical wireless communication
  • Information security

Background:

  • Light-fidelity (LiFi) is a complementary indoor wireless technology to radio-frequency (RF).
  • The broadcast nature of LiFi poses eavesdropping risks despite spatial containment.

Purpose of the Study:

  • To provide an overview of recent developments in LiFi physical layer security (PLS).
  • To compare LiFi PLS with RF PLS and investigate security enhancement techniques.

Main Methods:

  • Analysis of LiFi achievable secrecy rates and upper bounds under practical channel models.
  • Investigation of beamforming and jamming techniques for LiFi PLS under indoor illumination constraints.

Main Results:

  • LiFi PLS differs from RF PLS, with specific achievable secrecy rates and bounds identified.
  • Beamforming and jamming show potential for enhancing LiFi PLS within indoor lighting limitations.

Conclusions:

  • LiFi PLS is a critical research area for secure indoor wireless networks.
  • Further research is needed to optimize beamforming and jamming for robust LiFi security.