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<div class="csl-entry">Selimović, M., Solař, R., Grunner, J., Mair, S., Wenzl, M., Heine, T., Pivoluska, M., Ursin, R., & Neumann, S. P. (2026, August). <i>Deployment of Entanglement-Based QKD in Financial Infrastructure : Four months of autonomous secure-key generation over a 22 km deployed fiber link</i> [Poster Presentation]. QCrypt 2026, Ottawa, Canada. https://doi.org/10.34726/12687</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/230863
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dc.identifier.uri
https://doi.org/10.34726/12687
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dc.description.abstract
We demonstrate the feasibility of entanglement-based quantum key distribution (eQKD) in high-security financial infrastructure over a 22 km fiber link with 8 dB loss between two data centers using polarization entanglement. The fully automated system continuously generated secure keys for four months at an average rate of 63.8 kb/s, which were stored into a key management system and consumed to establish a VPN tunnel. The setup achieved 93.7% total up-time, with no downtime caused by the quantum optical components. Active polarization control kept the quantum bit error rate below 2% for 97.4% of the time and timing synchronization based on the entangled photon pairs’ intrinsic temporal correlations achieved sub-300 ps precision. Our standalone system requires neither polarized guide lasers nor external high-precision time references. These results show practical integration of eQKD into operational financial infrastructure.
