State Grid Fujian Electric Power Co., Ltd.

State Grid Fujian Fuzhou Electric Power Supply Company

State Grid Info-telecom Great Power Science and Technology Co., Ltd.

Gonghua Hou

Wei Chen

Wei Yu Lin

Xi Chen

Siyuan Qian

Ruyin Chen

Xinyi Lin

Kai Li

Yuanzheng Wang

Changgui Huang

Yuepian Ye

Baoping Zou

Xiao Feng

Jincheng Li

Lifan Yang

Xincheng Huang

Jiefei Lin

The present disclosure relates to a quantum key distribution (QKD) method based on a tree QKD network. The method includes: judging a position of a parent node of the source node Sand a position of a parent node of the destination node S; if the parent node is a trusted relay node, directly transferring an initial shared key of the source node Sand the parent node to the destination node Saccording to an exclusive OR (XOR) relay scheme, and ending the process; and if the parent node is an untrusted relay node, emitting, by the source node Sand the destination node S, photons to a measuring-device-independent quantum key distribution (MDI-QKD) receiver of the parent node through a QKD emitter, generating a shared key by an MDI-QKD method, then transmitting the shared key according to the XOR relay scheme, and ending the process.

Quantum key distribution method and system based on tree QKD network

Growing community of inventors

Fujian, China

Gonghua Hou