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Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization
Quantum digital signatures (QDS) are able to verify the authenticity and integrity of a message in modern communication. However, the current QDS protocols are restricted by the fundamental rate-loss bound and the secure signature distance cannot be further improved. We propose a twin-field quantum...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9222926/ https://www.ncbi.nlm.nih.gov/pubmed/35741559 http://dx.doi.org/10.3390/e24060839 |
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author | Wu, Jiayao He, Chen Xie, Jiahui Liu, Xiaopeng Zhang, Minghui |
author_facet | Wu, Jiayao He, Chen Xie, Jiahui Liu, Xiaopeng Zhang, Minghui |
author_sort | Wu, Jiayao |
collection | PubMed |
description | Quantum digital signatures (QDS) are able to verify the authenticity and integrity of a message in modern communication. However, the current QDS protocols are restricted by the fundamental rate-loss bound and the secure signature distance cannot be further improved. We propose a twin-field quantum digital signature (TF-QDS) protocol with fully discrete phase randomization and investigate its performance under the two-intensity decoy-state setting. For better performance, we optimize intensities of the signal state and the decoy state for each given distance. Numerical simulation results show that our TF-QDS with as few as six discrete random phases can give a higher signature rate and a longer secure transmission distance compared with current quantum digital signatures (QDSs), such as BB84-QDS and measurement-device-independent QDS (MDI-QDS). Moreover, we provide a clear comparison among some possible TF-QDSs constructed by different twin-field key generation protocols (TF-KGPs) and find that the proposed TF-QDS exhibits the best performance. Conclusively, the advantages of the proposed TF-QDS protocol in signature rate and secure transmission distance are mainly due to the single-photon interference applied in the measurement module and precise matching of discrete phases. Besides, our TF-QDS shows the feasibility of experimental implementation with current devices in practical QDS system. |
format | Online Article Text |
id | pubmed-9222926 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92229262022-06-24 Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization Wu, Jiayao He, Chen Xie, Jiahui Liu, Xiaopeng Zhang, Minghui Entropy (Basel) Article Quantum digital signatures (QDS) are able to verify the authenticity and integrity of a message in modern communication. However, the current QDS protocols are restricted by the fundamental rate-loss bound and the secure signature distance cannot be further improved. We propose a twin-field quantum digital signature (TF-QDS) protocol with fully discrete phase randomization and investigate its performance under the two-intensity decoy-state setting. For better performance, we optimize intensities of the signal state and the decoy state for each given distance. Numerical simulation results show that our TF-QDS with as few as six discrete random phases can give a higher signature rate and a longer secure transmission distance compared with current quantum digital signatures (QDSs), such as BB84-QDS and measurement-device-independent QDS (MDI-QDS). Moreover, we provide a clear comparison among some possible TF-QDSs constructed by different twin-field key generation protocols (TF-KGPs) and find that the proposed TF-QDS exhibits the best performance. Conclusively, the advantages of the proposed TF-QDS protocol in signature rate and secure transmission distance are mainly due to the single-photon interference applied in the measurement module and precise matching of discrete phases. Besides, our TF-QDS shows the feasibility of experimental implementation with current devices in practical QDS system. MDPI 2022-06-18 /pmc/articles/PMC9222926/ /pubmed/35741559 http://dx.doi.org/10.3390/e24060839 Text en © 2022 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 Wu, Jiayao He, Chen Xie, Jiahui Liu, Xiaopeng Zhang, Minghui Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title | Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title_full | Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title_fullStr | Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title_full_unstemmed | Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title_short | Twin-Field Quantum Digital Signature with Fully Discrete Phase Randomization |
title_sort | twin-field quantum digital signature with fully discrete phase randomization |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9222926/ https://www.ncbi.nlm.nih.gov/pubmed/35741559 http://dx.doi.org/10.3390/e24060839 |
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