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dc.contributor.authorBunandar, Darius
dc.contributor.authorEnglund, Dirk R.
dc.date.accessioned2021-01-29T15:22:34Z
dc.date.available2021-01-29T15:22:34Z
dc.date.issued2020-06
dc.date.submitted2020-03
dc.identifier.issn2469-9934
dc.identifier.issn2469-9926
dc.identifier.urihttps://hdl.handle.net/1721.1/129596
dc.description.abstractQuantum key distribution (QKD) promises provably secure cryptography, even to attacks from an all-powerful adversary. However, with quantum computing development lagging behind QKD, the assumption that there exists an adversary equipped with a universal fault-tolerant quantum computer is unrealistic for at least the near-future. Here, we explore the effect of restricting the eavesdropper's computational capabilities on the security of QKD and find that improved secret key rates are possible. Specifically, we show that for a large class of discrete variable protocols higher key rates are possible if the eavesdropper is restricted to a unitary operation from the Clifford group. Further, we consider Clifford-random channels consisting of mixtures of Clifford gates. We numerically calculate a secret-key-rate lower bound for BB84 with this restriction and show that, in contrast to the case of a single restricted unitary attack, the mixture of Clifford-based unitary attacks does not result in an improved key rate.en_US
dc.language.isoen
dc.publisherAmerican Physical Society (APS)en_US
dc.relation.isversionof10.1103/PhysRevA.101.062318en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAPSen_US
dc.titleClifford-group-restricted eavesdroppers in quantum key distributionen_US
dc.typeArticleen_US
dc.identifier.citationGovia, L. C. G. et al. “Clifford-group-restricted eavesdroppers in quantum key distribution.” Physical Review A, 101, 6 (June 2020): 062318 © 2020 The Author(s)en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Scienceen_US
dc.relation.journalPhysical Review Aen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-12-14T19:06:25Z
dspace.orderedauthorsGovia, LCG; Bunandar, D; Lin, J; Englund, D; Lütkenhaus, N; Krovi, Hen_US
dspace.date.submission2020-12-14T19:06:30Z
mit.journal.volume101en_US
mit.journal.issue6en_US
mit.licensePUBLISHER_POLICY


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