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dc.contributor.authorKent, A
dc.contributor.authorLowndes, D
dc.contributor.authorPitalúa-García, D
dc.contributor.authorRarity, J
dc.date.accessioned2022-03-11T16:00:30Z
dc.date.available2022-03-11T16:00:30Z
dc.date.issued2022
dc.date.submitted2021-04-21
dc.identifier.issn2056-6387
dc.identifier.others41534-022-00524-4
dc.identifier.other524
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/334896
dc.descriptionFunder: UK Quantum Communications Hub grants no. EP/M013472/1 and EP/T001011/1; Perimeter Institute for Theoretical Physics.
dc.description.abstractUnforgeable quantum money tokens were the first invention of quantum information science, but remain technologically challenging as they require quantum memories and/or long distance quantum communication. More recently, virtual 'S-money' tokens were introduced. These are generated by quantum cryptography, do not require quantum memories or long distance quantum communication, and yet in principle guarantee many of the security advantages of quantum money. Here, we describe implementations of S-money schemes with off-the-shelf quantum key distribution technology, and analyse security in the presence of noise, losses, and experimental imperfection. Our schemes satisfy near instant validation without cross-checking. We show that, given standard assumptions in mistrustful quantum cryptographic implementations, unforgeability and user privacy could be guaranteed with attainable refinements of our off-the-shelf setup. We discuss the possibilities for unconditionally secure (assumption-free) implementations.
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.subjectArticle
dc.subject/639/766/483/481
dc.subject/639/766/259
dc.subjectarticle
dc.titlePractical quantum tokens without quantum memories and experimental tests
dc.typeArticle
dc.date.updated2022-03-11T16:00:30Z
prism.issueIdentifier1
prism.publicationNamenpj Quantum Information
prism.volume8
dc.identifier.doi10.17863/CAM.82334
dcterms.dateAccepted2022-01-11
rioxxterms.versionofrecord10.1038/s41534-022-00524-4
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidKent, A [0000-0003-2624-3687]
dc.contributor.orcidPitalúa-García, D [0000-0002-7579-578X]
dc.identifier.eissn2056-6387
pubs.funder-project-idEPSRC (via University of York) (EP/M013472/1)
pubs.funder-project-idEPSRC (via University of York) (EP/T001011/1)
cam.issuedOnline2022-03-11


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