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dc.contributor.authorGong, Yupeng
dc.contributor.authorWonfor, Adrian
dc.contributor.authorHunt, Jeffrey H.
dc.contributor.authorWhite, Ian H.
dc.contributor.authorPenty, Richard V.
dc.date.accessioned2021-11-04T16:21:32Z
dc.date.available2021-11-04T16:21:32Z
dc.date.issued2021-11-04
dc.date.submitted2021-07-17
dc.identifier.others41598-021-01013-y
dc.identifier.other1013
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/330287
dc.description.abstractAbstract: Security issues and attack management of optical communication have come increasingly important. Quantum techniques are explored to secure or protect classical communication. In this paper, we present a method for in-service optical physical layer security monitoring that has vacuum-noise level sensitivity without classical security loopholes. This quantum-based method of eavesdropping detection, similar to that used in conventional pilot tone systems, is achieved by sending quantum signals, here comprised of continuous variable quantum states, i.e. weak coherent states modulated at the quantum level. An experimental demonstration of attack detection using the technique was presented for an ideal fibre tapping attack that taps 1% of the ongoing light in a 10 dB channel, and also an ideal correlated jamming attack in the same channel that maintains the light power with excess noise increased by 0.5 shot noise unit. The quantum monitoring system monitors suspicious changes in the quantum signal with the help of advanced data processing algorithms. In addition, unlike the CV-QKD system which is very sensitive to channel excess noise and receiver system noise, the quantum monitoring is potentially more compatible with current optical infrastructure, as it lowers the system requirements and potentially allows much higher classical data rate communication with links length up to 100 s km.
dc.languageen
dc.publisherNature Publishing Group UK
dc.subjectArticle
dc.subject/639/624/1075/187
dc.subject/639/624/400/482
dc.subjectarticle
dc.titleExperimental demonstration of confidential communication with quantum security monitoring
dc.typeArticle
dc.date.updated2021-11-04T16:21:31Z
prism.issueIdentifier1
prism.publicationNameScientific Reports
prism.volume11
dc.identifier.doi10.17863/CAM.77731
dcterms.dateAccepted2021-09-29
rioxxterms.versionofrecord10.1038/s41598-021-01013-y
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.identifier.eissn2045-2322
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.77727


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