Title :
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
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;
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
DOI :
10.1109/CLEOE-IQEC.2007.4387003
