Free space relativistic quantum cryptography with faint laser pulses
S. N. Molotkov, T. A. Potapova · Laser Physics Letters · 2013
A new protocol for quantum key distribution through empty space is proposed. Apart from the quantum mechanical restrictions on distinguishability of non-orthogonal states, the protocol employs additional restrictions imposed by special relativity. The protocol ensures generation of a secure key even for the source generating non-strictly single-photon quantum states and for arbitrary losses in quantum communication channel.