Faint laser pulses versus a single-photon source in free space quantum cryptography
S. N. Molotkov, T. A. Potapova · Laser Physics Letters · 2016
In this letter we present estimates for the distance of secret key transmission through free space for three different protocols of quantum key distribution: for BB84 and phase time-coding protocols in the case of a strictly single-photon source , and for the relativistic quantum key distribution protocol in the case of faint laser pulses .