Title:
単一光子検出装置及び量子鍵配送用受信装置
Document Type and Number:
Japanese Patent JP6933114
Kind Code:
B2
Abstract:
[Problem] To eliminate hacking by a bright illumination attack on a quantum key delivery receiving device equipped with a single photon detector. [Solution] The present invention comprises: a random number generator that generates random number bit value information which includes a random number value i and the time at which the random number value i was generated; a light intensity modulator that modulates the intensity of light input from the outside at a transmittance Ti determined by the random number value i; a single photon detector that receives input of the input light which was intensity-modulated by the light intensity modulator and generates, as reception information, a time at which a single photon was detected; and a counting processing circuit that calculates a determination value Si/(TiMi) for the random number value i from a photon detection rate Si of the single photon detector, a mark rate Mi which is the percentage accounted for by the random number value i of the random number values generated by the random number value generator, and the transmittance Ti, and that outputs an authentication signal indicating authentication if the determination value satisfies a predetermined criteria or outputs an authentication signal indicating denial if the predetermined criteria is not satisfied.
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Inventors:
Shin Arahira
Application Number:
JP2017231240A
Publication Date:
September 08, 2021
Filing Date:
November 30, 2017
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
H04L9/12; G02F1/01; G02F3/00; H04B10/70
Domestic Patent References:
| JP2012069944A |
Other References:
HONJO, T. et al.,Countermeasure against tailored bright illumination attack for DPS-QKD,Optics Express,vol.21, no.3,OSA Publishing,2013年02月11日,p.2667-2673,[online], [検索日2018.12.14], インターネット
Attorney, Agent or Firm:
Hiroyuki Okada
Takashi Ogaki
Takashi Ogaki