Secure quantum key distribution with a subset of malicious devices

Abstract The malicious manipulation of quantum key distribution (QKD) hardware is a serious threat to its security, as, typically, neither end users nor QKD manufacturers can validate the integrity of every component of their QKD system in practice. One possible approach to re-establish the security...

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Autores principales:	Víctor Zapatero, Marcos Curty
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/07174a04c1fb47cc888859497bec3adc
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spelling	oai:doaj.org-article:07174a04c1fb47cc888859497bec3adc2021-12-02T14:06:53ZSecure quantum key distribution with a subset of malicious devices10.1038/s41534-020-00358-y2056-6387https://doaj.org/article/07174a04c1fb47cc888859497bec3adc2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00358-yhttps://doaj.org/toc/2056-6387Abstract The malicious manipulation of quantum key distribution (QKD) hardware is a serious threat to its security, as, typically, neither end users nor QKD manufacturers can validate the integrity of every component of their QKD system in practice. One possible approach to re-establish the security of QKD is to use a redundant number of devices. Following this idea, we address various corruption models of the possibly malicious devices and show that, compared to the most conservative model of active and collaborative corrupted devices, natural assumptions allow to significantly enhance the secret key rate or considerably reduce the necessary resources. Furthermore, we show that, for most practical situations, the resulting finite-size secret key rate is similar to that of the standard scenario assuming trusted devices.Víctor ZapateroMarcos CurtyNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Víctor Zapatero Marcos Curty Secure quantum key distribution with a subset of malicious devices
description	Abstract The malicious manipulation of quantum key distribution (QKD) hardware is a serious threat to its security, as, typically, neither end users nor QKD manufacturers can validate the integrity of every component of their QKD system in practice. One possible approach to re-establish the security of QKD is to use a redundant number of devices. Following this idea, we address various corruption models of the possibly malicious devices and show that, compared to the most conservative model of active and collaborative corrupted devices, natural assumptions allow to significantly enhance the secret key rate or considerably reduce the necessary resources. Furthermore, we show that, for most practical situations, the resulting finite-size secret key rate is similar to that of the standard scenario assuming trusted devices.
format	article
author	Víctor Zapatero Marcos Curty
author_facet	Víctor Zapatero Marcos Curty
author_sort	Víctor Zapatero
title	Secure quantum key distribution with a subset of malicious devices
title_short	Secure quantum key distribution with a subset of malicious devices
title_full	Secure quantum key distribution with a subset of malicious devices
title_fullStr	Secure quantum key distribution with a subset of malicious devices
title_full_unstemmed	Secure quantum key distribution with a subset of malicious devices
title_sort	secure quantum key distribution with a subset of malicious devices
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/07174a04c1fb47cc888859497bec3adc
work_keys_str_mv	AT victorzapatero securequantumkeydistributionwithasubsetofmaliciousdevices AT marcoscurty securequantumkeydistributionwithasubsetofmaliciousdevices
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Secure quantum key distribution with a subset of malicious devices

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