PT Unknown AU Verevkin, A Williams, C Gol’tsman, GN Sobolewski, R Gilbert, G AU Optical Fiber Communication Conference and International Conference on Quantum Information TI Single-photon superconducting detectors for practical high-speed quantum cryptography PY 2001 DI 10.1364/Icqi.2001.Pa3 DE NbN SSPD; SNSPD; QKD; quantum cryptography AB We have developed an ultrafast superconducting single-photon detector with negligible dark counting rate. The detector is based on an ultrathin, submicron-wide NbN meander-type stripe and can detect individual photons in the visible to near-infrared wavelength range at a rate of at least 10 Gb/s. The above counting rate allows us to implement the NbN device to unconditionally secret quantum key distRochester, New Yorkribution in a practical, high-speed system using real-time Vernam enciphering. ER