Finite-Key Analysis for Coherent One-Way Quantum Key Distribution
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2023
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866909065673703424 |
|---|---|
| author | Li, Ming-Yang Cao, Xiao-Yu Xie, Yuan-Mei Yin, Hua-Lei Chen, Zeng-Bing |
| author_facet | Li, Ming-Yang Cao, Xiao-Yu Xie, Yuan-Mei Yin, Hua-Lei Chen, Zeng-Bing |
| contents | Coherent-one-way (COW) quantum key distribution (QKD) is a significant communication protocol that has been implemented experimentally and deployed in practical products due to its simple equipment requirements. However, existing security analyses of COW-QKD either provide a short transmission distance or lack immunity against coherent attacks in the finite-key regime. In this paper, we present a tight finite-key security analysis within the universally composable framework for a variant of COW-QKD, which has been proven to extend the secure transmission distance in the asymptotic case. We combine the quantum leftover hash lemma and entropic uncertainty relation to derive the key rate formula. When estimating statistical parameters, we use the recently proposed Kato's inequality to ensure security against coherent attacks and achieve a higher key rate. Our paper confirms the security and feasibility of COW-QKD for practical application and lays the foundation for further theoretical study and experimental implementation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_16136 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Finite-Key Analysis for Coherent One-Way Quantum Key Distribution Li, Ming-Yang Cao, Xiao-Yu Xie, Yuan-Mei Yin, Hua-Lei Chen, Zeng-Bing Quantum Physics Coherent-one-way (COW) quantum key distribution (QKD) is a significant communication protocol that has been implemented experimentally and deployed in practical products due to its simple equipment requirements. However, existing security analyses of COW-QKD either provide a short transmission distance or lack immunity against coherent attacks in the finite-key regime. In this paper, we present a tight finite-key security analysis within the universally composable framework for a variant of COW-QKD, which has been proven to extend the secure transmission distance in the asymptotic case. We combine the quantum leftover hash lemma and entropic uncertainty relation to derive the key rate formula. When estimating statistical parameters, we use the recently proposed Kato's inequality to ensure security against coherent attacks and achieve a higher key rate. Our paper confirms the security and feasibility of COW-QKD for practical application and lays the foundation for further theoretical study and experimental implementation. |
| title | Finite-Key Analysis for Coherent One-Way Quantum Key Distribution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2309.16136 |