Secret Keys from Parity Bits in the Satellite Setting

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A4 Artikkeli konferenssijulkaisussa
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Date

2022

Department

Department of Information and Communications Engineering

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Mcode

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Language

en

Pages

6
2672-2677

Series

2022 IEEE International Symposium on Information Theory, ISIT 2022, IEEE International Symposium on Information Theory - Proceedings, Volume 2022-June

Abstract

We consider a two-way secret key distribution protocol in the satellite setting, where Alice, Bob and Eve each decode bits from noisy signals received from a source in their environment. Alice and Bob perform advantage distillation to find a secret key. We apply a Two-way Protocol with Parity bit Reconciliation (TPPR) where secret keys are collected from parity bits in course of advantage distillation, not only from the final distilled bits. We analyze the mutual information acquired by Eve from exploiting the original eavesdropped information together with the information leaked during the distillation protocol, as well as TPPR secret key rate. Comparing to the ParityCheck Protocol (PCP) known in the literature, TPPR provides complementary performance. In operation regions where PCP fare badly as compared to one-way protocols, TPPR provides gains in key rate.

Description

Funding Information: This work was funded by the Academy of Finland (grant 334539). Publisher Copyright: © 2022 IEEE.

Keywords

secret key agreement, source model

Other note

DOI

10.1109/ISIT50566.2022.9834762

Citation

Lietzén, J, Tirkkonen, O & Vehkalahti, R 2022, Secret Keys from Parity Bits in the Satellite Setting . in 2022 IEEE International Symposium on Information Theory, ISIT 2022 . IEEE International Symposium on Information Theory, vol. 2022-June, IEEE, pp. 2672-2677, IEEE International Symposium on Information Theory, Espoo, Finland, 26/06/2022 . https://doi.org/10.1109/ISIT50566.2022.9834762

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https://urn.fi/URN:NBN:fi:aalto-202301181323

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