Quantum key synchronization system and method based on hierarchical tree cluster unit

Abstract

The invention relates to a quantum key synchronization system and method based on hierarchical tree cluster units; the quantum key synchronization system based on hierarchical tree cluster units is composed of a plurality of tree cluster units, and a topology unit is divided into a top layer tree cluster unit, a two-layer tree cluster unit and an N-layer tree cluster unit according to network planning and logic hierarchy. Compared with the prior art, the method is based on the global tree cluster relation table recording the node membership, and the two nodes can obtain the shared key from thetop-level node with the closest membership, so that the complexity, communication and calculation pressure of each central node are reduced; therefore, the defects that in a large-scale network structure, the complexity of a single center node is too high, the communication calculation pressure is too large, and the system performance and stability are influenced are avoided; meanwhile, by adopting the topological structure of the multi-center and multi-layer tree cluster unit, the system and method can be applied to a scene of large-scale multi-party encryption communication, the limitationon the practicability of quantum communication is removed, the network topology can be flexibly expanded, and the deployment cost of quantum channels is reduced 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 hierarchical tree cluster units. Background technique [0002] In recent years, quantum communication technology has achieved rapid development. In the process of practical quantum communication, Quantum Key Distribution (Quantum Key Distribution, QKD for short) technology applied to highly secure communication has attracted high attention and made great achievements. With the progress of quantum key distribution network as a secure communication network 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. QKD terminals are usually deployed at network nodes. When a network node transmits data, a quantum key is needed When encr...

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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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