A method and system for recovering from an optical fiber quantum key distribution network failure

Abstract

The invention provides a fiber optic quantum key distribution network failure recovery method, which comprises the following steps: when a fiber optic quantum key distribution QKD network is faulty, determining a fiber optic QKD source node and a fiber optic QKD destination node corresponding to an affected service; acquiring a first target ground station in connection with the fiber optic QKD source node and a second target ground station in connection with the fiber optic QKD destination node; and using the first target ground station, a preset quantum satellite, and the second target groundstation as relay nodes between the fiber optic QKD source node and the fiber optic QKD destination node to recover the affected service corresponding to the fiber optic QKD source node and the fiberoptic QKD destination node. By utilizing the satellite-ground QKD between the quantum satellite and the ground station and combining the ground fiber optic QKD between the ground station and the fiberoptic QKD network, the method can realize the rapid recovery of the fiber optic QKD network failure in heaven-earth collaboration, which effectively improves the failure recovery efficiency of the fiber optic QKD network, and solves the problem that the current fiber optic QKD network failure is difficult to quickly respond and recover in time.

Description

technical field [0001] The invention relates to the field of optical fiber quantum key distribution, and more particularly, to a fault recovery method and system for optical fiber quantum key distribution network. Background technique [0002] Quantum Key Distribution (QKD) refers to the process or method of generating and distributing symmetric keys using quantum properties, which is guaranteed in principle by quantum information theory. According to the different transmission channels, QKD can be divided into optical fiber QKD and free space QKD. Among them, optical fiber QKD has a relatively mature technology and a high degree of practicality, and has gradually become a confidential communication network for some government and financial departments. [0003] As an important infrastructure for carrying QKD, the nodes and links in the optical fiber QKD network may fail or be physically attacked, resulting in the destruction of the QKD process. Once the point-to-point optic...

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Problems solved by technology

[0003] As an important infrastructure for carrying QKD, nodes and links in the optical fiber QKD network may fail or be physically attacked, resulting in the destruction of the QKD process. Once the point-to-point optical fiber QKD cannot respond quickly and recover in time, it will cause its bearing The confidential business cannot be transmitted securely, resulting in multiple business security risks and long service waiting delays

[0004] Therefore, there is an urgent need for a fiber optic quantum key distribution network failure recovery method to solve the problem that the current fiber optic QKD network failure is difficult to respond quickly and recover in time

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