Security and gain improvement of a practical quantum key distribution using a gated single-photon source and probabilistic photon-number resolution

Journal Article · Fri Jul 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.012312· OSTI ID:20718320

Horikiri, Tomoyuki; Sasaki, Hideki; Wang, Haibo; Kobayashi, Takayoshi ^[1]

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1. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation (JST) and Department of Physics, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-0033 (Japan)

We propose a high security quantum key distribution (QKD) scheme utilizing one mode of spontaneous parametric downconversion gated by a photon number resolving detector. This photon number measurement is possible by using single-photon detectors operating at room temperature and optical fibers. By post selection, the multiphoton probability in this scheme can be reduced to lower than that of a scheme using an attenuated coherent light resulting in improvement of security. Furthermore, if distillation protocol (error correction and privacy amplification) is performed, the gain will be increased. Hence a QKD system with higher security and bit rate than the laser-based QKD system can be attained using present available technologies.

• OSTI ID: 20718320
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRECTIONS
DISTRIBUTION
ENERGY LEVELS
ERRORS
GAIN
MULTI-PHOTON PROCESSES
OPTICAL FIBERS
OPTICS
PHOTONS
PROBABILISTIC ESTIMATION
PROBABILITY
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
RESOLUTION
SECRECY PROTECTION
SECURITY
VISIBLE RADIATION