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Erschienen in: Quantum Information Processing 12/2019

01.12.2019

Security analysis of passive measurement-device-independent continuous-variable quantum key distribution with almost no public communication

verfasst von: Xiaodong Wu, Yijun Wang, Sha Li, Wei Zhang, Duan Huang, Ying Guo

Erschienen in: Quantum Information Processing | Ausgabe 12/2019

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Abstract

We perform security analysis of a passive measurement-device-independent (MDI) continuous-variable quantum key distribution (CVQKD) protocol with almost no public communication. In the passive MDI-CVQKD protocol, the quantum states are prepared passively by using thermal sources without Gaussian modulations at Alice’s and Bob’s sides. With this technique, Alice and Bob can precisely prepare quantum states to match the high transmission rate in MDI-CVQKD system at the corresponding speed. Here, both asymptotic regime and finite-size regime are considered. In asymptotic case, we derive the security bounds for the protocol against collective attacks, while in finite-size case we show a new conceptual development of passive MDI-CVQKD, namely the final secret key generation can be performed by using almost all raw keys instead of sacrificing part of raw keys for parameter estimation, and thus the improvement performance of passive MDI-CVQKD protocol can be achieved in finite-size scenario.

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Metadaten
Titel
Security analysis of passive measurement-device-independent continuous-variable quantum key distribution with almost no public communication
verfasst von
Xiaodong Wu
Yijun Wang
Sha Li
Wei Zhang
Duan Huang
Ying Guo
Publikationsdatum
01.12.2019
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 12/2019
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2486-0

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