What fundamentally new properties are introduced by special relativity to quantum cryptography in open space?
S. N. Molotkov, D. I. Pomozov · Journal of Experimental and Theoretical Physics Letters · 2007
A fundamentally new relativistic quantum cryptography protocol has been proposed for key distribution through open space. The protocol guarantees the security of keys at any damping and for a nonstrictly single-photon source of quantum states.