Premium
Detection of a PNS attack by means of the quasiprobability function of the weak coherent states with phase diffusion in a CV‐QKD system
Author(s) -
Leyva Josué Aarón López,
Mondragon Arturo Arvizu
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29096
Subject(s) - quantum key distribution , physics , quantum mechanics , coherent states , diffusion , microwave , phase (matter) , attenuation , wigner distribution function , quantum , quantum optics , photon , quantum noise , statistical physics
On this article, we present a technique to detect photon number splitting (PNS) attacks in the quantum channel of a continuous variable‐quantum key distribution system using weak coherent states with phase diffusion by means of the S‐parameterized quasiprobability function of a quantum state in steady state. Such quasiprobability function is obtained with an optoelectronic Costas loop. We compare the performances of PNS attack systems considering in first place just the attenuation and then the attenuation with the vacuum noise added due to a spy system. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1349–1352, 2015