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Article

Secret Key Agreement for SISO Visible Light Communication Systems

Information Engineering University, Zhengzhou 450001, China
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Author to whom correspondence should be addressed.
Photonics 2025, 12(5), 498; https://doi.org/10.3390/photonics12050498
Submission received: 17 March 2025 / Revised: 27 April 2025 / Accepted: 13 May 2025 / Published: 16 May 2025

Abstract

This paper studies the use of secret key agreement for single-input single-output (SISO) visible light communication (VLC) systems. Specifically, we put forward a scheme for secret key generation and analyze the secret key rate in SISO VLC systems. First, we derive the secret key capacity bounds. Then, we analyze the achievable secret key rate distribution versus the illegal receiver’s location when the legal receiver’s location is fixed. Meanwhile, we deduce the average secret key capacity using random geometry knowledge when all the receivers’ positions are unknown. We also analyze the impact of employing a protected zone on the average secret key capacity and observe that a protected zone can obviously improve the secret performance. Finally, simulations are presented to verify the theoretical analysis.
Keywords: secret key agreement; VLC; secret key capacity; protected zone secret key agreement; VLC; secret key capacity; protected zone

Share and Cite

MDPI and ACS Style

Guo, D.; Zhang, J.; Xin, G.; Tian, K.; Xiao, X. Secret Key Agreement for SISO Visible Light Communication Systems. Photonics 2025, 12, 498. https://doi.org/10.3390/photonics12050498

AMA Style

Guo D, Zhang J, Xin G, Tian K, Xiao X. Secret Key Agreement for SISO Visible Light Communication Systems. Photonics. 2025; 12(5):498. https://doi.org/10.3390/photonics12050498

Chicago/Turabian Style

Guo, Dongqin, Jian Zhang, Gang Xin, Keming Tian, and Xingyu Xiao. 2025. "Secret Key Agreement for SISO Visible Light Communication Systems" Photonics 12, no. 5: 498. https://doi.org/10.3390/photonics12050498

APA Style

Guo, D., Zhang, J., Xin, G., Tian, K., & Xiao, X. (2025). Secret Key Agreement for SISO Visible Light Communication Systems. Photonics, 12(5), 498. https://doi.org/10.3390/photonics12050498

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