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Autori principali: Horoschenkoff, P., Henrich, J., Böhn, R., Khan, I., Rödiger, J., Gunkel, M., Bauch, M., Benda, J., Bläcker, P., Eichhammer, E., Eismann, U., Frenck, G., Griesser, H., Jontofsohn, W., Kopshoff, N., Röhrich, S., Seidl, F., Schark, N., Sollner, E., von Blanckenburg, D., Heinemann, A., Stiemerling, M., Gärtner, M.
Natura: Preprint
Pubblicazione: 2025
Soggetti:
Quantum Physics
Networking and Internet Architecture
Accesso online:https://arxiv.org/abs/2503.21186
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Sommario:
  • Quantum Key Distribution Networks (QKDN) enable secure communication even in the age of powerful quantum computers. In the hands of a network operator, which can offer its service to many users, the economic viability of a QKDN increases significantly. The highly challenging operator-user relationship in a large-scale network setting demands additional requirements to ensure carrier-grade operation. Addressing this challenge, this work presents a carrier-grade QKDN architecture, which combines the functional QKDN architecture with the operational perspective of a network operator, ultimately enhancing the economic viability of QKDN. The focus is on the network and key management aspects of a QKDN while assuming state-of-the-art commercial QKD-Modules. The presented architecture was rolled out within an in-field demonstrator, connecting the cities of Berlin and Bonn over a link distance of 923 km across Germany. We could show, that the proposed network architecture is feasible, integrable, and scalable making it suitable for deployment in real-world networks. Overall, the presented carrier-grade QKDN architecture promises to serve as a blueprint for network operators providing QKD-based services to their customers.

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