Applicability of Squeezed- and Coherent-StateContinuous-Variable Quantum Key Distributionover Satellite Links
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73603559" target="_blank" >RIV/61989592:15310/21:73603559 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/1099-4300/23/1/55/htm" target="_blank" >https://www.mdpi.com/1099-4300/23/1/55/htm</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/e23010055" target="_blank" >10.3390/e23010055</a>
Alternative languages
Result language
angličtina
Original language name
Applicability of Squeezed- and Coherent-StateContinuous-Variable Quantum Key Distributionover Satellite Links
Original language description
We address the applicability of quantum key distribution with continuous-variable coherent and squeezed states over long-distance satellite-based links, considering low Earth orbits and taking into account strong varying channel attenuation, atmospheric turbulence and finite data ensemble size effects. We obtain tight security bounds on the untrusted excess noise on the channel output, which suggest that substantial efforts aimed at setup stabilization and reduction of noise and loss are required, or the protocols can be realistically implemented over satellite links once either individual or passive collective attacks are assumed. Furthermore, splitting the satellite pass into discrete segments and extracting the key from each rather than from the overall single pass allows one to effectively improve robustness against the untrusted channel noise and establish a secure key under active collective attacks. We show that feasible amounts of optimized signal squeezing can substantially improve the applicability of the protocols allowing for lower system clock rates and aperture sizes and resulting in higher robustness against channel attenuation and noise compared to the coherent-state protocol
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Entropy
ISSN
1099-4300
e-ISSN
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Volume of the periodical
23
Issue of the periodical within the volume
1
Country of publishing house
CH - SWITZERLAND
Number of pages
14
Pages from-to
"55-1"-"55-14"
UT code for WoS article
000610124100001
EID of the result in the Scopus database
2-s2.0-85098751384