Effect of dispersion and damping in a communication channel on the secrecy of a quantum cryptosystem
S. N. Molotkov · Journal of Experimental and Theoretical Physics Letters · 1996
The effect of dispersion in the communication channel on the secrecy of a quantum cryptosystem based on the use of single-photon states with different frequencies is investigated. The critical length of the communication channel such that confidentiality of the key distribution can still be ensured is found.