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Title: Versatile security analysis of measurement-device-independent quantum key distribution
Authors: Ignatius William Primaatmaja
Emilien Lavie
Keywords: Quantum key distribution
Issue Date: 25-Jun-2019
Publisher: American Physical Society
Citation: Ignatius William Primaatmaja, Emilien Lavie, GOH KOON TONG, WANG CHAO, LIM CI WEN (2019-06-25). Versatile security analysis of measurement-device-independent quantum key distribution. Physical Review A 99 (6) : 062332. ScholarBank@NUS Repository.
Rights: Attribution-NonCommercial 4.0 International
Abstract: Measurement-device-independent quantum key distribution (MDI-QKD) is the only known QKD scheme that can completely overcome the problem of detection side-channel attacks. Yet, despite its practical importance, there is no standard approach towards proving the security of MDI-QKD. Here, we present a simple numerical method that can efficiently compute almost-tight security bounds for any discretely modulated MDI-QKD protocol. To demonstrate the broad utility of our method, we use it to analyze the security of coherent-state MDI-QKD, decoy-state MDI-QKD with leaky sources, and a variant of twin-field QKD called phase-matching QKD. In all of the numerical simulations (using realistic detection models) we find that our method gives significantly higher secret key rates than those obtained with current security proof techniques. Interestingly, we also find that phase-matching QKD using only two coherent test states is enough to overcome the fundamental rate-distance limit of QKD. Taken together, these findings suggest that our security proof method enables a versatile, fast, and possibly optimal approach towards the security validation of practical MDI-QKD systems.
Source Title: Physical Review A
ISBN: 2469-9926
ISSN: 2469-9934
DOI: 10.1103/PhysRevA.99.062332
Rights: Attribution-NonCommercial 4.0 International
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