Scheme fro Practical Server-client COW-QKD Based on Auto-Compensated Fiber Interferometer

IGNACIO LÓPEZ GRANDE; MIGUEL A. LAROTONDA

Washinton DC

Conferencia; QCrypt; 2016

We present an experimental proposal for a distributed-phase-reference (DPR) QKD scheme based on the Coherent One Way (COW)protocol, a plug & play setup and an auto-compensated fiber interferometer. The scheme is presented on a server-client fashion with all the delicate and expensive components in the server side (laser, detector and interferometer) while the client side comprises only an intensity modulator and a Faraday mirror. The arrangement is intended to generate secure cryptographic key at high rates in a simple way. We explore two alternatives for the server's experimental setup; in one case using a Faraday-Michelson interferometer (FMI) configuration and in the other employing a Polarization-Beam-Splitter based Mach-Zehnder (MZI) interferometer.