Secret key rates for intensity-modulated dual-threshold detection key distribution under individual beam splitting attacks

Tobias A. Eriksson; Phuc V. Trinh; Hiroyuki Endo; Masahiro Takeoka; Masahide Sasaki

doi:10.1364/OE.26.020409

Secret key rates for intensity-modulated dual-threshold detection key distribution under individual beam splitting attacks

Tobias A. Eriksson, Phuc V. Trinh, Hiroyuki Endo, Masahiro Takeoka, Masahide Sasaki

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We investigate the secret key rates for the recently proposed intensity-modulated dual-threshold key distribution [T. Ikuta and K. Inoue, New J. Phys. 18 (2016)] under beam splitting attacks. We show that previous assumptions on an eavesdropper that performs hard decision measurements on the channel, overestimates the secret key rate. We discuss the impact of an eavesdropper that can measure full soft information and give the secret key rates under forward and reverse reconciliation. Further, we perform simulations for different system assumptions and show the optimal modulation depths for these systems. We also outline an attack on this protocol based on photon counting that prohibits secret key generation.

Original language	English
Pages (from-to)	20409-20419
Number of pages	11
Journal	Optics Express
Volume	26
Issue number	16
DOIs	https://doi.org/10.1364/OE.26.020409
Publication status	Published - 2018 Aug 6
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.26.020409

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abstract = "We investigate the secret key rates for the recently proposed intensity-modulated dual-threshold key distribution [T. Ikuta and K. Inoue, New J. Phys. 18 (2016)] under beam splitting attacks. We show that previous assumptions on an eavesdropper that performs hard decision measurements on the channel, overestimates the secret key rate. We discuss the impact of an eavesdropper that can measure full soft information and give the secret key rates under forward and reverse reconciliation. Further, we perform simulations for different system assumptions and show the optimal modulation depths for these systems. We also outline an attack on this protocol based on photon counting that prohibits secret key generation.",

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AU - Trinh, Phuc V.

AU - Endo, Hiroyuki

AU - Takeoka, Masahiro

AU - Sasaki, Masahide

N1 - Funding Information: ImPACT Program of Council for Science, Technology, and Innovation, Japan; Japan Society for the Promotion of Science (JSPS) KAKENHI (18H01157). Publisher Copyright: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Y1 - 2018/8/6

N2 - We investigate the secret key rates for the recently proposed intensity-modulated dual-threshold key distribution [T. Ikuta and K. Inoue, New J. Phys. 18 (2016)] under beam splitting attacks. We show that previous assumptions on an eavesdropper that performs hard decision measurements on the channel, overestimates the secret key rate. We discuss the impact of an eavesdropper that can measure full soft information and give the secret key rates under forward and reverse reconciliation. Further, we perform simulations for different system assumptions and show the optimal modulation depths for these systems. We also outline an attack on this protocol based on photon counting that prohibits secret key generation.

AB - We investigate the secret key rates for the recently proposed intensity-modulated dual-threshold key distribution [T. Ikuta and K. Inoue, New J. Phys. 18 (2016)] under beam splitting attacks. We show that previous assumptions on an eavesdropper that performs hard decision measurements on the channel, overestimates the secret key rate. We discuss the impact of an eavesdropper that can measure full soft information and give the secret key rates under forward and reverse reconciliation. Further, we perform simulations for different system assumptions and show the optimal modulation depths for these systems. We also outline an attack on this protocol based on photon counting that prohibits secret key generation.

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Secret key rates for intensity-modulated dual-threshold detection key distribution under individual beam splitting attacks

Abstract

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