Title: Experimental demonstrations of visible light communication using quantum noise for high security

Authors: Ning Xiao; Sihui Chen; Feifei Chen; Shuai Shi

Addresses: Department of Information Engineering, Nanning College of Technology, No. 317, Yanshan Street, Guilin, Guangxi, 541006, China ' Department of Information Engineering, Nanning College of Technology, No. 317, Yanshan Street, Guilin, Guangxi, 541006, China ' Department of Information Engineering, Nanning College of Technology, No. 317, Yanshan Street, Guilin, Guangxi, 541006, China ' 34th Institute, China Electronics Technology Group Corporation, No. 98, Liuhe Road, Guilin, Guangxi, 541004, China

Abstract: This paper reports on a symmetric-key direct-data encryption technique that ensures the security of optical signals at the physical layer in a visible light transmission system. Security is achieved by masking the signal with quantum noise. Encryption with quantum noise masking is realised by converting the data into a multilevel optical signal of intensity modulation. The effect of the quantum noise masking is easily superimposed on the ciphertext signal, which also fully uses the inevitable characteristics of quantum noise. We have demonstrated experimentally a 100 Mbit/s visible light cipher system with quantum noise masking. The visible light transmission system implements high security with adequate quantum noise masking.

Keywords: quantum noise; physical layer security; encryption; intensity modulation; visible light communication.

DOI: 10.1504/IJSNET.2026.156057

International Journal of Sensor Networks, 2026 Vol.52 No.1, pp.1 - 6

Received: 24 Jan 2025
Accepted: 02 Sep 2025
Published online: 02 Sep 2026 *

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