@article{8bcc0d2c6d9b4da39cf1bdadaa906d00,
title = "Experimental transmission of quantum digital signatures over 90 km of installed optical fiber using a differential phase shift quantum key distribution system",
abstract = "Quantum digital signatures (QDSs) apply quantum mechanics to the problem of guaranteeing message integrity and non-repudiation with information-theoretical security, which are complementary to the confidentiality realized by quantum key distribution (QKD). Previous experimental demonstrations have been limited to transmission distances of less than 5 km of optical fiber in a laboratory setting. Here we report, to the best of our knowledge, the first demonstration of QDSs over installed optical fiber, as well as the longest transmission link reported to date. This demonstration used a 90 km long differential phase shift QKD to achieve approximately one signed bit per second, an increase in the signature generation rate of several orders of magnitude over previous optical fiber demonstrations.",
author = "Collins, {Robert J.} and Ryan Amiri and Mikio Fujiwara and Toshimori Honjo and Kaoru Shimizu and Kiyoshi Tamaki and Masahiro Takeoka and Erika Andersson and Buller, {Gerald S.} and Masahide Sasaki",
note = "Funding Information: Daiwa Anglo-Japanese Foundation (10803/11543); Engineering and Physical Sciences Research Council (EPSRC) (EP/G009821/1, EP/K022717/1, EP/K015338/1); ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). The authors gratefully acknowledge K. Yoshino, T. Ochi, and A. Tajima of NEC for supporting the operation of the QKD link between Koganei and Fuchu. Publisher Copyright: {\textcopyright} 2016 Optical Society of America.",
year = "2016",
month = nov,
day = "1",
doi = "10.1364/OL.41.004883",
language = "English",
volume = "41",
pages = "4883--4886",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "The Optical Society",
number = "21",
}