METHOD OF DETECTING AN ATTACK ON QUANTUM STATES IN A QUANTUM COMMUNICATION CHANNEL Russian patent published in 2020 - IPC H04L9/08 

FIELD: quantum cryptography.

SUBSTANCE: invention relates to the field of quantum cryptography. Technical result is achieved due to the fact that at the stage of transmission of the series of packages the length of the series of parcels is set and for each sending in the series the preparation of the transmitting and receiving sides is performed, transmission of the sending by the transmitting side and reception of the sending by the receiving side, wherein preparation of transmitting side includes selecting randomly and equitably one of two transmission side bases, selecting randomly and equitably one of two phase values in the selected basis, synchronizing the total time between the transmitting and receiving sides and preparing the transmitting side of the quantum state which unambiguously corresponds to the selected phase value.

EFFECT: technical result consists in provision of detection in systems of quantum cryptography with phase and polarization encoding of false quantum states in quantum communication channel generated by intruder.

3 cl, 6 dwg