Experimental measurement-device-independent quantum digital signatures

We propose and experimentally implement a novel reconfigurable quantum key distribution (QKD) scheme, where the users can switch in real time between conventional QKD and the recently-introduced measurement-device-independent (MDI) QKD. Through this setup, we demonstrate the distribution of quantum...

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Bibliographic Details
Published in:arXiv.org 2017-03
Main Authors: Roberts, G L, Lucamarini, M, Yuan, Z L, Dynes, J F, Comandar, L C, Sharpe, A W, Shields, A J, Curty, M, Puthoor, I V, Andersson, E
Format: Article
Language:English
Subjects:
Digital signatures
Quantum cryptography
Variations
Online Access:Get full text
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Summary:We propose and experimentally implement a novel reconfigurable quantum key distribution (QKD) scheme, where the users can switch in real time between conventional QKD and the recently-introduced measurement-device-independent (MDI) QKD. Through this setup, we demonstrate the distribution of quantum keys between three remote parties connected by only two quantum channels, a previously unattempted task. Moreover, as a prominent application, we extract the first quantum digital signature (QDS) rates from a network that uses a measurement-device-independent link. In so doing, we introduce an efficient protocol to distil multiple signatures from the same block of data, thus reducing the statistical fluctuations in the sample and increasing the final QDS rate.
ISSN:2331-8422
DOI:10.48550/arxiv.1703.00493