Realization of quantum digital signatures without the requirement of quantum memory
Collins, Robert J. and Donaldson, Ross J. and Dunjko, Vedran and Wallden, Petros and Clarke, Patrick J. and Andersson, Erika and Jeffers, John and Buller, Gerald S. (2014) Realization of quantum digital signatures without the requirement of quantum memory. Physical Review Letters, 113 (4). 040502. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.113.040502)
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Abstract
Digital signatures are widely used to provide security for electronic communications, for example, in financial transactions and electronic mail. Currently used classical digital signature schemes, however, only offer security relying on unproven computational assumptions. In contrast, quantum digital signatures offer information-theoretic security based on laws of quantum mechanics. Here, security against forging relies on the impossibility of perfectly distinguishing between nonorthogonal quantum states. A serious drawback of previous quantum digital signature schemes is that they require long-term quantum memory, making them impractical at present. We present the first realization of a scheme that does not need quantum memory and which also uses only standard linear optical components and photodetectors. In our realization, the recipients measure the distributed quantum signature states using a new type of quantum measurement, quantum state elimination. This significantly advances quantum digital signatures as a quantum technology with potential for real applications.
ORCID iDs
Collins, Robert J., Donaldson, Ross J., Dunjko, Vedran, Wallden, Petros, Clarke, Patrick J., Andersson, Erika, Jeffers, John ORCID: https://orcid.org/0000-0002-8573-1675 and Buller, Gerald S.;-
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Item type: Article ID code: 50511 Dates: DateEvent21 July 2014PublishedSubjects: Science > Physics Department: Faculty of Science > Physics
University of Strathclyde > University of StrathclydeDepositing user: Pure Administrator Date deposited: 25 Nov 2014 10:56 Last modified: 25 Sep 2024 00:36 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/50511