Lupo, Cosmo orcid.org/0000-0002-5227-4009, Ottaviani, Carlo orcid.org/0000-0002-0032-3999, Papanastasiou, Panagiotis et al. (1 more author) (2018) Continuous-variable measurement-device-independent quantum key distribution: Composable security against coherent attacks. Physical Review A. 052327. pp. 1-10. ISSN 1094-1622
Abstract
We present a rigorous security analysis of continuous-variable measurement-device-independent quantum key distribution (CVMDI QKD) in a finite-size scenario. The security proof is obtained in two steps: by first assessing the security against collective Gaussian attacks, and then extending to the most general class of coherent attacks via the Gaussian de Finetti reduction. Our result combines recent state-of-the-art security proofs for CVQKD with findings about min-entropy calculus and parameter estimation. In doing so, we improve the finite-size estimate of the secret key rate. Our conclusions confirm that CV MDI protocols allow for high rates on the metropolitan scale, and may achieve a nonzero secret key rate against the most general class of coherent attacks after 10^7–10^9 quantum signal transmissions, depending on loss and noise, and on the required level of security.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2018 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 08 May 2018 11:30 |
Last Modified: | 28 Mar 2025 00:07 |
Published Version: | https://doi.org/10.1103/PhysRevA.97.052327 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevA.97.052327 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:130536 |
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Filename: PhysRevA.97.052327.pdf
Description: PhysRevA.97.052327