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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 2667–2673

Countermeasure against tailored bright illumination attack for DPS-QKD

Toshimori Honjo, Mikio Fujiwara, Kaoru Shimizu, Kiyoshi Tamaki, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Zhen Wang, and Masahide Sasaki  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 2667-2673 (2013)

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We propose a countermeasure against the so-called tailored bright illumination attack for differential-phase-shift QKD (DPS-QKD). By monitoring a rate of coincidence detection at a pair of superconducting nanowire single-photon detectors (SSPDs) which is connected at each of the output ports of Bob’s Mach-Zehnder interferometer, Alice and Bob can detect and defeat this kind of attack. We also experimentally confirmed the feasibility of this countermeasure using our 1 GHz-clocked DPS-QKD system. In the emulation of the attack, we achieved much lower power of the bright illumination light compared with the original demonstration by using a pulse stream instead of broad pulses.

© 2013 OSA

OCIS Codes
(270.5570) Quantum optics : Quantum detectors
(270.5568) Quantum optics : Quantum cryptography

ToC Category:
Quantum Optics

Original Manuscript: November 30, 2012
Revised Manuscript: January 4, 2013
Manuscript Accepted: January 18, 2013
Published: January 28, 2013

Toshimori Honjo, Mikio Fujiwara, Kaoru Shimizu, Kiyoshi Tamaki, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Zhen Wang, and Masahide Sasaki, "Countermeasure against tailored bright illumination attack for DPS-QKD," Opt. Express 21, 2667-2673 (2013)

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