Experimental transmission of quantum digital signatures over 90-km of installed optical fiber using a differential phase shift quantum key distribution system

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

Research output: Contribution to journalArticle

26 Citations (Scopus)
27 Downloads (Pure)

Abstract

Quantum digital signatures 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. Previous experimental demonstrations have been limited to transmission distances of less than 5-km of optical fiber in a laboratory setting. Here we report the first demonstration of quantum digital signatures over installed optical fiber as well as the longest transmission link reported to date. This demonstration used a 90-km long differential phase shift quantum key distribution system 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
Original languageEnglish
Pages (from-to)4883-4886
Number of pages4
JournalOptics Letters
Volume41
Issue number21
Early online date28 Sep 2016
DOIs
Publication statusPublished - 19 Oct 2016

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