Samsung Advanced Institute of Technology

This study presents a novel physical layer security technique that aims to increase

the security level by reducing decryption attempts and improving the resistance to security

attacks. To achieve this goal, the proposed approach generates signals that resemble Gaussian

noise in both the time and frequency domains. This method utilizes a wavelength-shuffled

optical orthogonal frequency division multiplexing (OFDM) scheme, which is combined with

the standard blue-excited phosphorus lighting approach. Experimental validation of the proposed

system demonstrates a secure data rate of 880 Mb/s in the aggregate, followed by a real-time

demonstration showing its practicality. Furthermore, the proposed system generates high-quality

white light (with a color rendering index of 83 and correlated color temperature of 5040 K),

which makes it suitable for practical illumination applications.