Qiu, K., Haw, J. Y., Qin, H., Ng, N. H. Y., Kasper, M., & Ling, A. (2024). Quantum-Secured Data Centre Interconnect in a field environment. Journal of Surveillance, Security and Safety, [Page numbers not yet available]. https://doi.org/
This article presents the findings of a field trial conducted to evaluate the feasibility and reliability of integrating a commercial quantum key distribution (QKD) system within the existing fiber optic infrastructure of a commercial data center environment.
The researchers deployed a commercial QKD system, the ID Quantique Cerberis XGR Series, utilizing the Coherent One Way (COW) protocol, across two data centers belonging to Singapore Technologies Telemedia Global Data Centres (STT-GDC). The QKD system was connected using the existing fiber optic network, with minimal modifications. The team monitored key performance indicators, including the secret key rate (SKR) and quantum bit error rate (QBER), over a 10-day period. Additionally, an attenuation test was performed to assess the system's performance under varying channel loss conditions. Finally, a quantum-secured virtual private network (Q-VPN) application was implemented to demonstrate secure file transfer between the two data centers using the generated QKD keys.
The field trial successfully demonstrated the feasibility and reliability of integrating commercial QKD technology within existing data center infrastructure for secure data transfer. The stable SKR, low QBER, and successful implementation of the Q-VPN application highlight the potential of QKD as a commercially viable solution for enhancing data security in the post-quantum era.
This research provides valuable insights into the practical challenges and opportunities associated with deploying QKD in real-world settings. The findings contribute to the growing body of knowledge on QKD and its potential to address emerging security threats in critical infrastructure like data centers.
The study was limited to a point-to-point QKD architecture between two data centers. Future research could explore the scalability of QKD to multi-point networks and investigate the integration of other quantum technologies, such as quantum repeaters, to further enhance security and performance.
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