Asymmetric double-field quantum key distribution method through power grid wide-area coordination control

Abstract

The invention discloses an asymmetric double-field quantum key distribution method through wide-area coordination control and a system. The method comprises the following steps: acquiring at least twolegal users Alice and Bob; determining pulse intensities and random phases of Alice and Bob in a decoy window, and judging whether the pulse intensities and the random phases are effective response events or not; according to the pulse intensity and the random phase, modulating the signal pulse and the decoy state pulse into different intensities and issuing the intensities; according to the modulated result and when it is determined that the event is an effective response event, respectively obtaining the lower bound Y1L and the error rate e1 of the single photon counting rates of Alice andBob; and performing error correction and privacy amplification on the lower bound Y1L and the error rate e1 of the single photon counting rate, determining a key generation rate and a final key, and finishing distribution. The method has the advantages that compared with the mode that an asymmetric channel is converted into a symmetric channel and an original symmetric protocol is utilized, the secret key generation rate and the transmission distance are effectively increased.

Description

technical field [0001] The invention relates to an asymmetric double-field quantum key distribution method oriented to wide-area coordinated control of a power grid, and belongs to the technical field of quantum communication security. Background technique [0002] With the rapid development of the energy Internet, my country's UHV long-distance AC and DC transmission lines continue to be constructed, new energy sources such as wind, light, gas, and geothermal are connected to the grid, and the wide-area coordinated control of large power grids is becoming increasingly complex. The situation is also becoming increasingly serious. In recent years, security incidents such as the Ukrainian power grid attack have occurred frequently, leading to major blackouts and other accidents, which have affected social stability and national security to a certain extent. Therefore, how to improve the security of wide-area coordinated control of large power grids is imminent. [0003] Quant...

AI Technical Summary

Problems solved by technology

Compared with the original TF-QKD, this protocol is more practical, and we have studied its performance by considering statistical fluctuations and a limited number of phase sheets, but the original SNS TF-QKD protocol is based on symmetric channels and is not suitable for In power system application scenarios

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