New protocols for quantum key distribution with explicit upper and lower bound on secret-key rate. (arXiv:2212.13089v1 [quant-ph])

Here we present two new schemes for quantum key distribution (QKD) which
neither require entanglement nor require an ideal single photon source. Thus,
the proposed protocols can be implemented using realistic single photon sources
which are commercially available. The schemes are shown to be secure against
multiple attacks (e.g., intercept resend attack and a class of collective
attacks). Bounds on the key rate are obtained and it is shown that by applying
a certain type of classical pre-processing, the tolerable …

distribution explicit key protocols quantum quantum key distribution rate secret