Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 37: Poster III

Q 37.57: Poster

Mittwoch, 13. März 2024, 17:00–19:00, Tent B

TOWARDS CONSUMER-LEVEL QUANTUM-SECURE CRYPTOGRAPHY ENTANGLEMENT-BASED SHORT-RANGE QUANTUM-KEY-DISTRIBUTION — •Luca Graf^{1, 2, 3}, Henning Mollenhauer^{1, 2, 3}, Till Appel^{1, 2, 3}, Daniel Tippel^{1, 2, 3}, Pius Gerisch^{1, 2, 3}, and Ralf Riedinger^{1, 2, 3} — ¹Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Deutschland — ²The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany — ³Institut für Quantenphysik, Universität Hamburg, 22761 Hamburg, Deutschland

Over the last years various methods of quantum key distribution (QKD) have been developed. Long distance implementations remain challenging due to the exponential loss of photons in quantum channels. A possible solution is hybrid cryptography, with key distribution over short distance, followed by quantum-secure classical encryption over long distance. Short-range QKD allows for exchanging an information-theoretically secure root-of-trust that is stored on two end modules. This root-of-trust is employed to generate encryption keys through classical rekeying algorithm. In this approach it is possible to spatially separate the end modules and communicate over existing communication infrastructure since no quantum channel required after initialization. We present an experimental setup for short-range QKD with low-cost end modules that has the potential to be made compact enough to be implemented with semiconductor electronics.

Keywords: Hybrid Quantum Communication; Quantum Key Distribution