Secure quantum key distribution over 40 km of fiber with a pulsed heralded single photon source

Author

Soujaeff, Alexandre ; Takeuchi, Shigeki ; Sasaki, Keiji ; Nishioka, Tsuyoshi ; Tsurumaru, Toyohiro ; Hasegawa, Toshio ; Matsui, Mitsuru

Author_Institution

CREST, Japan Sci. & Technol. Agency, Sapporo

fYear

2007

fDate

17-22 June 2007

Firstpage

1

Lastpage

1

Abstract

Despite technically successful experiments, most of current quantum key distribution (QKD) systems based on the original BB84 protocols are insecure. The reason is the usage of weak coherent pulses (WCP) as pseudo single photon source (SPS), which allows an eavesdropper to get full information on the key in presence of high optical losses on the transmission channel. To overcome this problem, we have developed a pulse heralded single photon source (HSPS), which we have used for QKD over 40 km of fiber.

Keywords

optical communication equipment; optical fibre communication; quantum cryptography; distance 40 km; fiber optic communication; pulsed heralded single photon source; secure quantum key distribution; weak coherent pulse; Information technology; Laser excitation; Nonlinear optics; Optical pulses; Optical pumping; Optical receivers; Photonic crystals; Protocols; Research and development; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on

Conference_Location

Munich

Print_ISBN

978-1-4244-0930-3

Electronic_ISBN

978-1-4244-0931-0

Type

conf

DOI

10.1109/CLEOE-IQEC.2007.4387003

Filename

4387003