A quantum key synchronization system and method based on hierarchical tree cluster unit

Abstract

A quantum key synchronization system and method based on hierarchical tree cluster units, including a quantum key synchronization system based on hierarchical tree cluster units, consisting of several tree cluster units, and topological units are divided into top-level tree clusters according to network planning and logical levels Unit, two-level tree cluster unit, N-level tree cluster unit. Compared with the prior art, the present invention is based on a global tree cluster relationship table that records the affiliation of nodes, and two nodes can obtain the shared key from the top-level node with the closest affiliation, reducing the complexity, communication and computing pressure of each central node, Avoid the defects of high complexity of a single central node and excessive communication and calculation pressure in a large-scale network structure, which will affect the performance and stability of the system; The scenario of large-scale multi-party encrypted communication has lifted the restrictions on the practical application of quantum communication, and can also flexibly expand the network topology, reducing the deployment cost of quantum channels to a certain extent.

Description

technical field [0001] The invention relates to the technical field of optical transmission security communication, in particular to a quantum key synchronization system and method based on a hierarchical tree cluster unit. Background technique [0002] In recent years, quantum communication technology has achieved rapid development. During the practical process of quantum communication, the Quantum Key Distribution (QKD) technology applied to highly confidential communication has attracted great attention and achieved great success. With the development of quantum key distribution network as a secure communication network, it has become a new research direction. [0003] In the current quantum key distribution network, a quantum key can be generated between two QKD terminals connected to each other through a quantum key distribution link. The QKD terminal is usually deployed at the network node, and the quantum key is required when the network node transmits data. When enc...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a quantum key synchronization system and method based on hierarchical tree cluster units to solve the problem of poor scalability of the topology of the quantum key synchronization system in the prior art, and the complexity of central nodes decreases with the increase of the number of nodes. The disadvantages of exponential increase, synchronization time-consuming, low efficiency, cannot be applied to the application of multi-party communication with large-scale and complex network topologies, resulting in technical defects that greatly limit the practical application of quantum communication

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