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Phys. Rev. A 76, 032312 (2007) [7 pages]

Key rate of quantum key distribution with hashed two-way classical communication

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Shun Watanabe*, Ryutaroh Matsumoto†, and Tomohiko Uyematsu‡
Department of Communication and Integrated Systems, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro-ku, Tokyo, 152-8552, Japan

Yasuhito Kawano§
NTT Communication Science Laboratories, NTT Corporation, 3-1, Wakamiya, Morinosato, Atsugishi, Kanagawa Prefecture, 243-0198, Japan

Received 3 June 2007; published 12 September 2007

We propose an information reconciliation protocol that uses two-way classical communication. The key rates of quantum key distribution (QKD) protocols that use our protocol are higher than those using previously known protocols for a wide range of error rates for the Bennett-Brassard 1984 and six-state protocols. We also clarify the relation between the proposed and known QKD protocols, and the relation between the proposed protocol and entanglement distillation protocols.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.032312
DOI:
10.1103/PhysRevA.76.032312
PACS:
03.67.Dd, 89.70.+c

*shun-wata@it.ss.titech.ac.jp

†ryutaroh@rmatsumoto.org; URL: http://www.rmatsumoto.org/research.html

‡uyematsu@ieee.org

§kawano@theory.brl.ntt.co.jp

 
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