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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 8 — Apr. 15, 2007
  • pp: 888–890

Secure quantum key distribution with a single not-so-weak coherent pulse

Chil-Min Kim, Yong-Wan Kim, and Young-Jai Park  »View Author Affiliations

Optics Letters, Vol. 32, Issue 8, pp. 888-890 (2007)

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We propose a secure quantum key distribution (QKD) protocol using a single not-so-weak coherent qubit. With two preprocesses for random rotation and compensation, a key bit is encoded to a randomly polarized not-so-weak coherent qubit. We analyze the security of the QKD protocol, which counters the photon number splitting and the impersonation attacks. The estimated mean number of photon, which is less than 6.0, guarantees security. Additionally, we discuss the possibility of quantum secure direct communication.

© 2007 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Coherence and Statistical Optics

Original Manuscript: September 11, 2006
Revised Manuscript: December 20, 2006
Manuscript Accepted: December 31, 2006
Published: March 19, 2007

Chil-Min Kim, Yong-Wan Kim, and Young-Jai Park, "Secure quantum key distribution with a single not-so-weak coherent pulse," Opt. Lett. 32, 888-890 (2007)

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