About: Experimental eavesdropping based on optimal quantum cloning

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The security of quantum cryptography is guaranteed by the no-cloning theorem, which implies that an eavesdropper copying transmitted qubits in unknown states causes their disturbance. Nevertheless, in real cryptographic systems some level of disturbance has to be allowed to cover, e.g., transmission losses. An eavesdropper can attack such systems by replacing a noisy channel by a better one and by performing approximate cloning of transmitted qubits which disturb them but below the noise level assumed by legitimate users. We experimentally demonstrate such symmetric individual eavesdropping on the quantum key distribution protocols of Bennett and Brassard (BB84) and the trine-state spherical code of Renes (R04) with two-level probes prepared using a recently developed photonic multifunctional quantum cloner [Lemr et al., Phys. Rev. A 85, 050307(R) (2012)]. The security of quantum cryptography is guaranteed by the no-cloning theorem, which implies that an eavesdropper copying transmitted qubits in unknown states causes their disturbance. Nevertheless, in real cryptographic systems some level of disturbance has to be allowed to cover, e.g., transmission losses. An eavesdropper can attack such systems by replacing a noisy channel by a better one and by performing approximate cloning of transmitted qubits which disturb them but below the noise level assumed by legitimate users. We experimentally demonstrate such symmetric individual eavesdropping on the quantum key distribution protocols of Bennett and Brassard (BB84) and the trine-state spherical code of Renes (R04) with two-level probes prepared using a recently developed photonic multifunctional quantum cloner [Lemr et al., Phys. Rev. A 85, 050307(R) (2012)]. (en)
Title	Experimental eavesdropping based on optimal quantum cloning Experimental eavesdropping based on optimal quantum cloning (en)
skos:prefLabel	Experimental eavesdropping based on optimal quantum cloning Experimental eavesdropping based on optimal quantum cloning (en)
skos:notation	RIV/68378271:_____/13:00399241!RIV14-GA0-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(EE2.3.20.0058), P(EE2.3.30.0004), P(EE2.3.30.0041), P(GAP205/12/0382)
http://linked.open...iv/cisloPeriodika	17
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Soubusta, Jan Černoch, Antonín
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	74033
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00399241
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	quantum cryptography; qubits; eavesdropping; quantum cloning (en)
http://linked.open.../riv/klicoveSlovo	quantum cryptography qubits quantum cloning eavesdropping
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[3196281ED248]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Suppresion of quantum noise using entanglement present in twin beams Podpora vytváření excelentních výzkumných týmů a intersektorální mobility na Univerzitě Palackého v Olomouci II. Regional Centre of Advanced Technologies and Materials Research team development of the Regional Centre of Advanced Technologies and Materials POST-UP Integration of Regional Centre of Advanced Technologies and Materials into International Networks of Nanotechnological and Optical Research.
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	110
http://linked.open...iv/tvurceVysledku	Lemr, K. Soubusta, Jan Černoch, Antonín Bartkiewicz, K. Miranowicz, A.
http://linked.open...ain/vavai/riv/wos	000317967700004
issn	0031-9007
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.110.173601

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