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Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities

As an essential application of quantum mechanics in classical cryptography, quantum secret sharing has become an indispensable component of quantum internet. Recently, a differential phase shift quantum secret sharing protocol using a twin field has been proposed to break the linear rate-distance bo...

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Autores principales: Jia, Zhao-Ying, Gu, Jie, Li, Bing-Hong, Yin, Hua-Lei, Chen, Zeng-Bing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8227985/
https://www.ncbi.nlm.nih.gov/pubmed/34199849
http://dx.doi.org/10.3390/e23060716
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author Jia, Zhao-Ying
Gu, Jie
Li, Bing-Hong
Yin, Hua-Lei
Chen, Zeng-Bing
author_facet Jia, Zhao-Ying
Gu, Jie
Li, Bing-Hong
Yin, Hua-Lei
Chen, Zeng-Bing
author_sort Jia, Zhao-Ying
collection PubMed
description As an essential application of quantum mechanics in classical cryptography, quantum secret sharing has become an indispensable component of quantum internet. Recently, a differential phase shift quantum secret sharing protocol using a twin field has been proposed to break the linear rate-distance boundary. However, this original protocol has a poor performance over channels with asymmetric transmittances. To make it more practical, we present a differential phase shift quantum secret sharing protocol with asymmetric source intensities and give the security proof of our protocol against individual attacks. Taking finite-key effects into account, our asymmetric protocol can theoretically obtain the key rate two orders of magnitude higher than that of the original protocol when the difference in length between Alice’s channel and Bob’s is fixed at 14 km. Moreover, our protocol can provide a high key rate even when the difference is quite large and has great robustness against finite-key effects. Therefore, our work is meaningful for the real-life applications of quantum secret sharing.
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spelling pubmed-82279852021-06-26 Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities Jia, Zhao-Ying Gu, Jie Li, Bing-Hong Yin, Hua-Lei Chen, Zeng-Bing Entropy (Basel) Article As an essential application of quantum mechanics in classical cryptography, quantum secret sharing has become an indispensable component of quantum internet. Recently, a differential phase shift quantum secret sharing protocol using a twin field has been proposed to break the linear rate-distance boundary. However, this original protocol has a poor performance over channels with asymmetric transmittances. To make it more practical, we present a differential phase shift quantum secret sharing protocol with asymmetric source intensities and give the security proof of our protocol against individual attacks. Taking finite-key effects into account, our asymmetric protocol can theoretically obtain the key rate two orders of magnitude higher than that of the original protocol when the difference in length between Alice’s channel and Bob’s is fixed at 14 km. Moreover, our protocol can provide a high key rate even when the difference is quite large and has great robustness against finite-key effects. Therefore, our work is meaningful for the real-life applications of quantum secret sharing. MDPI 2021-06-04 /pmc/articles/PMC8227985/ /pubmed/34199849 http://dx.doi.org/10.3390/e23060716 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jia, Zhao-Ying
Gu, Jie
Li, Bing-Hong
Yin, Hua-Lei
Chen, Zeng-Bing
Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title_full Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title_fullStr Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title_full_unstemmed Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title_short Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
title_sort differential phase shift quantum secret sharing using a twin field with asymmetric source intensities
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8227985/
https://www.ncbi.nlm.nih.gov/pubmed/34199849
http://dx.doi.org/10.3390/e23060716
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