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Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light

Digital signatures are frequently used in data transfer to prevent impersonation, repudiation and message tampering. Currently used classical digital signature schemes rely on public key encryption techniques, where the complexity of so-called ‘one-way' mathematical functions is used to provide...

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Autores principales: Clarke, Patrick J., Collins, Robert J., Dunjko, Vedran, Andersson, Erika, Jeffers, John, Buller, Gerald S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3493646/
https://www.ncbi.nlm.nih.gov/pubmed/23132024
http://dx.doi.org/10.1038/ncomms2172
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author Clarke, Patrick J.
Collins, Robert J.
Dunjko, Vedran
Andersson, Erika
Jeffers, John
Buller, Gerald S.
author_facet Clarke, Patrick J.
Collins, Robert J.
Dunjko, Vedran
Andersson, Erika
Jeffers, John
Buller, Gerald S.
author_sort Clarke, Patrick J.
collection PubMed
description Digital signatures are frequently used in data transfer to prevent impersonation, repudiation and message tampering. Currently used classical digital signature schemes rely on public key encryption techniques, where the complexity of so-called ‘one-way' mathematical functions is used to provide security over sufficiently long timescales. No mathematical proofs are known for the long-term security of such techniques. Quantum digital signatures offer a means of sending a message, which cannot be forged or repudiated, with security verified by information-theoretical limits and quantum mechanics. Here we demonstrate an experimental system, which distributes quantum signatures from one sender to two receivers and enables message sending ensured against forging and repudiation. Additionally, we analyse the security of the system in some typical scenarios. Our system is based on the interference of phase-encoded coherent states of light and our implementation utilizes polarization-maintaining optical fibre and photons with a wavelength of 850 nm.
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spelling pubmed-34936462012-11-09 Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light Clarke, Patrick J. Collins, Robert J. Dunjko, Vedran Andersson, Erika Jeffers, John Buller, Gerald S. Nat Commun Article Digital signatures are frequently used in data transfer to prevent impersonation, repudiation and message tampering. Currently used classical digital signature schemes rely on public key encryption techniques, where the complexity of so-called ‘one-way' mathematical functions is used to provide security over sufficiently long timescales. No mathematical proofs are known for the long-term security of such techniques. Quantum digital signatures offer a means of sending a message, which cannot be forged or repudiated, with security verified by information-theoretical limits and quantum mechanics. Here we demonstrate an experimental system, which distributes quantum signatures from one sender to two receivers and enables message sending ensured against forging and repudiation. Additionally, we analyse the security of the system in some typical scenarios. Our system is based on the interference of phase-encoded coherent states of light and our implementation utilizes polarization-maintaining optical fibre and photons with a wavelength of 850 nm. Nature Pub. Group 2012-11-06 /pmc/articles/PMC3493646/ /pubmed/23132024 http://dx.doi.org/10.1038/ncomms2172 Text en Copyright © 2012, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Clarke, Patrick J.
Collins, Robert J.
Dunjko, Vedran
Andersson, Erika
Jeffers, John
Buller, Gerald S.
Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title_full Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title_fullStr Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title_full_unstemmed Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title_short Experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
title_sort experimental demonstration of quantum digital signatures using phase-encoded coherent states of light
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3493646/
https://www.ncbi.nlm.nih.gov/pubmed/23132024
http://dx.doi.org/10.1038/ncomms2172
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