Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution

Robert John Collins, Ryan Amiri, Mikio Fujiwara, Toshimori Honjo, Kaoru Shimizu, Kiyoshi Tamaki, Masahiro Takeoka, Masahide Sasaki, Anna Erika Elisabeth Andersson, Gerald Stuart Buller

Research output: Contribution to journalArticle

Abstract

Ensuring the integrity and transferability of digital messages is an important challenge in modern communications. Although purely mathematical approaches exist, they usually rely on the computational complexity of certain functions, in which case there is no guarantee of long-term security. Alternatively, quantum digital signatures offer security guaranteed by the physical laws of quantum mechanics. Prior experimental demonstrations of quantum digital signatures in optical fiber have typically been limited to operation over short distances and/or operated in a laboratory environment. Here we report the experimental transmission of quantum digital signatures over channel losses of up to 42.8  ±1.2 dB in a link comprised of 90 km of installed fiber with additional optical attenuation introduced to simulate longer distances. The channel loss of 42.8 ± 1.2 dB corresponds to an equivalent distance of 134.2 ± 3.8 km and this represents the longest effective distance and highest channel loss that quantum digital signatures have been shown to operate over to date. Our theoretical model indicates that this represents close to the maximum possible channel attenuation for this quantum digital signature protocol, defined as the loss for which the signal rate is comparable to the dark count rate of the detectors.
Original languageEnglish
Article number3235
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 12 Jun 2017

Fingerprint

Optical Fibers
Mechanics
Theoretical Models

Cite this

Collins, Robert John ; Amiri, Ryan ; Fujiwara, Mikio ; Honjo, Toshimori ; Shimizu, Kaoru ; Tamaki, Kiyoshi ; Takeoka, Masahiro ; Sasaki, Masahide ; Andersson, Anna Erika Elisabeth ; Buller, Gerald Stuart. / Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution. In: Scientific Reports. 2017 ; Vol. 7.
@article{9135488b3b4841988d7d801d2a4ee9eb,
title = "Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution",
abstract = "Ensuring the integrity and transferability of digital messages is an important challenge in modern communications. Although purely mathematical approaches exist, they usually rely on the computational complexity of certain functions, in which case there is no guarantee of long-term security. Alternatively, quantum digital signatures offer security guaranteed by the physical laws of quantum mechanics. Prior experimental demonstrations of quantum digital signatures in optical fiber have typically been limited to operation over short distances and/or operated in a laboratory environment. Here we report the experimental transmission of quantum digital signatures over channel losses of up to 42.8  ±1.2 dB in a link comprised of 90 km of installed fiber with additional optical attenuation introduced to simulate longer distances. The channel loss of 42.8 ± 1.2 dB corresponds to an equivalent distance of 134.2 ± 3.8 km and this represents the longest effective distance and highest channel loss that quantum digital signatures have been shown to operate over to date. Our theoretical model indicates that this represents close to the maximum possible channel attenuation for this quantum digital signature protocol, defined as the loss for which the signal rate is comparable to the dark count rate of the detectors.",
author = "Collins, {Robert John} and Ryan Amiri and Mikio Fujiwara and Toshimori Honjo and Kaoru Shimizu and Kiyoshi Tamaki and Masahiro Takeoka and Masahide Sasaki and Andersson, {Anna Erika Elisabeth} and Buller, {Gerald Stuart}",
year = "2017",
month = "6",
day = "12",
doi = "10.1038/s41598-017-03401-9",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution. / Collins, Robert John; Amiri, Ryan; Fujiwara, Mikio; Honjo, Toshimori; Shimizu, Kaoru; Tamaki, Kiyoshi; Takeoka, Masahiro; Sasaki, Masahide; Andersson, Anna Erika Elisabeth; Buller, Gerald Stuart.

In: Scientific Reports, Vol. 7, 3235, 12.06.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution

AU - Collins, Robert John

AU - Amiri, Ryan

AU - Fujiwara, Mikio

AU - Honjo, Toshimori

AU - Shimizu, Kaoru

AU - Tamaki, Kiyoshi

AU - Takeoka, Masahiro

AU - Sasaki, Masahide

AU - Andersson, Anna Erika Elisabeth

AU - Buller, Gerald Stuart

PY - 2017/6/12

Y1 - 2017/6/12

N2 - Ensuring the integrity and transferability of digital messages is an important challenge in modern communications. Although purely mathematical approaches exist, they usually rely on the computational complexity of certain functions, in which case there is no guarantee of long-term security. Alternatively, quantum digital signatures offer security guaranteed by the physical laws of quantum mechanics. Prior experimental demonstrations of quantum digital signatures in optical fiber have typically been limited to operation over short distances and/or operated in a laboratory environment. Here we report the experimental transmission of quantum digital signatures over channel losses of up to 42.8  ±1.2 dB in a link comprised of 90 km of installed fiber with additional optical attenuation introduced to simulate longer distances. The channel loss of 42.8 ± 1.2 dB corresponds to an equivalent distance of 134.2 ± 3.8 km and this represents the longest effective distance and highest channel loss that quantum digital signatures have been shown to operate over to date. Our theoretical model indicates that this represents close to the maximum possible channel attenuation for this quantum digital signature protocol, defined as the loss for which the signal rate is comparable to the dark count rate of the detectors.

AB - Ensuring the integrity and transferability of digital messages is an important challenge in modern communications. Although purely mathematical approaches exist, they usually rely on the computational complexity of certain functions, in which case there is no guarantee of long-term security. Alternatively, quantum digital signatures offer security guaranteed by the physical laws of quantum mechanics. Prior experimental demonstrations of quantum digital signatures in optical fiber have typically been limited to operation over short distances and/or operated in a laboratory environment. Here we report the experimental transmission of quantum digital signatures over channel losses of up to 42.8  ±1.2 dB in a link comprised of 90 km of installed fiber with additional optical attenuation introduced to simulate longer distances. The channel loss of 42.8 ± 1.2 dB corresponds to an equivalent distance of 134.2 ± 3.8 km and this represents the longest effective distance and highest channel loss that quantum digital signatures have been shown to operate over to date. Our theoretical model indicates that this represents close to the maximum possible channel attenuation for this quantum digital signature protocol, defined as the loss for which the signal rate is comparable to the dark count rate of the detectors.

U2 - 10.1038/s41598-017-03401-9

DO - 10.1038/s41598-017-03401-9

M3 - Article

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 3235

ER -