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IEEE Silchar Subsection Conference (SILCON)

Performance Analysis of Quantum Computing Security Mechanisms in Free Space Optics (FSO) Communication Link

Gaurav Soni

Published Nov 6, 2025• 0 citations
Publisher
DOI
10.1109/silcon67893.2025.11327299

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Free-Space Optical (FSO) communication technology can cater to various types of connectivity requirements within optical networks, including core, edge, and access networks. However, the performance of FSO communication links can be adversely affected by severe atmospheric conditions, such as turbulence and weather-related factors. In this study, we have investigated the benefits of photon entangled 16-QAM- FSO link in improving the performance of FSO communication under diverse weather and atmospheric turbulence conditions. The efficient implementation of a practical secure quantum communication network may revolutionize the terrestrial and non-terrestrial communication both form speed and security point of view.
One of the fundamental issues in the field of wireless communication is security. To overcome this problem, hybrid radio frequency (RF)/free space optical (FSO) link with the presence of an eavesdropper present are modelled and an algorithm is proposed to select the most secure link based on the derived security metrics. The FSO links are modelled using exponential distribution considering different parameter values, thus exhibiting a strong atmospheric turbulent nature of the environment. Divergent environments and channel conditions tend to make the RF and FSO channels behave uniquely and complementary to each other. To attain high data rates along with higher reliability, RF and FSO links are incorporated together to form a hybrid FSO/RF communication system. The proposed algorithm is based on a security metric which is determined by computing the probability of strictly positive secrecy capacity (SPSC). Analytical closed-form expressions of SPSC have been obtained for the proposed system. Further, monte carlo simulations are performed to validate and confer the analytical results.
Abstract Quantum‐based technologies will provide system engineers with new capabilities for securing data communications. The UK AirQKD project has implemented a Free‐Space Optical Quantum Key Distribution (QKD) system to enable the continuous generation of symmetric encryption keys. One of the use cases for the generated keys is to secure Vehicle‐to‐Everything (V2X) communications. V2X applications would benefit from the certificate‐free security provided by QKD for a post‐quantum society. How FSO‐QKD could integrate into a V2X architecture is examined. An overview of V2X is provided with the role that FSO‐QKD could secure V2X data though some obstacles exist. One of the issues with 6G communications is the potential line‐of‐sight (LOS) considerations between the V2X devices. The modelling required for LOS is examined to analyse the outage performance of the building to infrastructure links in the 6G architecture. The results from the model show that further work is required if 6G LOS communications are going to be relied upon for future safety‐critical V2X applications.