Passive-scheme analysis for solving the untrusted source problem in quantum key distribution
Passive-scheme analysis for solving the untrusted source problem in quantum key distribution
As a practical method, the passive scheme is useful to monitor the photon statistics of an untrusted source in a ``Plug Play'' quantum key distribution (QKD) system. In a passive scheme, three kinds of monitor mode can be adopted: average photon number (APN) monitor, photon number analyzer (PNA), and photon …