A device identification method based on LED fingerprint for visible light communication system.

In future networks, with the advent of massive machine type communications (mMTC), physical layer security is becoming a significant research area in the fifth generation (5G) and beyond 5G (B5G) communication systems. Device fingerprinting is a technology widely viewed to enhance the security of radio frequency (RF) based wireless systems. Meanwhile, visible light communication (VLC) is developing rapidly due to its remarkably high throughput in indoor situations and its security advantages for both privacy and health. In this paper, a VLC device fingerprint extraction and identification method are presented to improve the security of Visible Light Communication (VLC) in the 5G network. This method based on the fingerprint of Light Emitting Diodes (LEDs) has been investigated theoretically and verified experimentally. Moreover, a laboratory demonstration showed that the fingerprints of five identical white LEDs could be extracted and identified successfully. The best identification accuracy was up to 98.8%.