We derive the time-dependent photo-detection probability equation of a superconducting single photon detector (SSPD) to study the responsive property for a pulse train at high repetition rate. Using this equation, we analyze the characteristics of SSPDs when illuminated by bright pulses in blinding attack on a quantum key distribution (QKD). We obtain good agreement between expected values based on our equation and actual experimental values. Such a time-dependent probability analysis contributes to security analysis.
@article{arxiv.1308.2295,
title = {Characteristics of superconducting single photon detector in DPS-QKD system under bright illumination blinding attack},
author = {Mikio Fujiwara and Toshimori Honjo and Kaoru Shimizu and Kiyoshi Tamaki and Masahide Sasaki},
journal= {arXiv preprint arXiv:1308.2295},
year = {2015}
}