State Grid Fujian Electric Power Co., Ltd.

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

State Grid Fujian Fuzhou Electric Power Supply Company

Kai Li

Wei Chen

Wei Yu Lin

Xi Chen

Ruyin Chen

Xincheng Huang

Xinyi Lin

Changgui Huang

Siyuan Qian

Yuanzheng Wang

Yuepian Ye

Xiao Feng

Gonghua Hou

Jincheng Li

Lifan Yang

Baoping Zou

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

Kai Li