CUED Publications database

Experimental measurement-device-independent quantum digital signatures

Roberts, GL and Lucamarini, M and Yuan, ZL and Dynes, JF and Comandar, LC and Sharpe, AW and Shields, AJ and Curty, M and Puthoor, IV and Andersson, E (2017) Experimental measurement-device-independent quantum digital signatures. Nature Communications, 8. 1098-.

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Abstract

The development of quantum networks will be paramount towards practical and secure telecommunications. These networks will need to sign and distribute information between many parties with information-Theoretic security, requiring both quantum digital signatures (QDS) and quantum key distribution (QKD). Here, we introduce and experimentally realise a quantum network architecture, where the nodes are fully connected using a minimum amount of physical links. The central node of the network can act either as a totally untrusted relay, connecting the end users via the recently introduced measurement-device-independent (MDI)-QKD, or as a trusted recipient directly communicating with the end users via QKD. Using this network, we perform a proof-of-principle demonstration of QDS mediated by MDI-QKD. For that, we devised an efficient protocol to distil multiple signatures from the same block of data, thus reducing the statistical fluctuations in the sample and greatly enhancing the final QDS rate in the finite-size scenario.

Item Type: Article
Uncontrolled Keywords: quant-ph quant-ph
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 25 Jul 2017 03:53
Last Modified: 13 Apr 2021 09:30
DOI: 10.1038/s41467-017-01245-5