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Quantum Information Processing
Erschienen in: Quantum Information Processing 4/2019

01.04.2019

Practical covert quantum key distribution with decoy-state method

verfasst von: Fen-Zhuo Guo, Li Liu, An-Kang Wang, Qiao-Yan Wen

Erschienen in: Quantum Information Processing | Ausgabe 4/2019

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Abstract

Covert communication methods are used in the communication with high security level. When it turns to quantum communication, covertness is also an important concern which is firstly discussed by Arrazola and Scarani (Phys Rev Lett, 117:250503, 2016). To make quantum key distribution (QKD) protocol more suitable in the scenarios need high security, we propose a covert QKD protocol with decoy-state method in this paper. The secure key rate and covertness of the covert decoy-state QKD are proved. We compare the performance of the covert decoy-state QKD with those of the original decoy-state QKD and covert QKD without decoy states in numerical simulations. It shows that (1) the covert decoy-state QKD can have a performance comparable to the original decoy-state QKD protocol besides its covertness; (2) the covert decoy-state QKD can have a considerable improvement of transmission distance over covert QKD without decoy states at the cost of a small change of covertness parameter. Furthermore, the statistical fluctuation due to the finite length of data is also taken into account based on the Gaussian analysis method.
Vorheriger Artikel Entanglement access control for the quantum Internet
Nächster Artikel Computing on quantum shared secrets for general quantum access structures

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Metadaten
Titel
Practical covert quantum key distribution with decoy-state method
verfasst von
Fen-Zhuo Guo
Li Liu
An-Kang Wang
Qiao-Yan Wen
Publikationsdatum
01.04.2019
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 4/2019
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2181-1

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