QUANTUM KEY DISTRIBUTION METHOD Russian patent published in 2023 - IPC H04L9/08 

FIELD: information transmitting.

SUBSTANCE: invention relates to means for transmitting information over a fiber optic channel based on methods and algorithms of quantum cryptography, mainly in the organization of optical networks of quantum key distribution. In the quantum key distribution method, which includes the transmission of optical key signals in the form of single photons with the basic polarization states corresponding to the selected protocol i from the sender to the recipient via a fiber optic channel and two-way information exchange via an open channel, moreover, optical signals are transmitted via a fiber optic channel from modulation of the outgoing polarization states on the sender side and their polarization detection by measuring the incoming polarization states on the receiver side, and the open channel is used to correct the distortion of optical signals in the fiber optic channel, two test optical signals are previously transmitted via the fiber optic channel from the sender to the receiver with modulation of polarization states corresponding to non-orthogonal Jones vectors measure the state of polarization of test optical signals at the output of the fiber optic channel and modulated on the side the polarization states of the test optical signals measured on the receiver side are determined by the Jones matrix J of the fiber optic channel, and the outgoing polarization states of the optical signals of the key on the sender side are calculated according to the matrix product .

EFFECT: increasing the rate of transmission of quantum information.

1 cl, 3 dwg, 1 tbl