Abstract: 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 S0 and a position of a parent node of the destination node Sd; if the parent node is a trusted relay node, directly transferring an initial shared key of the source node S0 and the parent node to the destination node Sd according 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 S0 and the destination node Sd, 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.

Abstract: The present disclosure relates to a quantum key distribution (QKD) method based on a tree QKD network. In a tree network, when parent nodes of a source node and a destination node are the same node, if the parent nodes are untrusted nodes, the source node and the destination node take the parent nodes as an MDI-QKD detector to generate a key, and if the parent nodes are trusted nodes, a shared key is directly transferred through XOR relay; and when the parent nodes of the source node and the destination node are not the same node and there are discontinuous untrusted relay nodes in a transmission path, the untrusted nodes are taken as an MDI-QKD detector to generate a key, and then the shared key is transferred through XOR relay.

Abstract: The present application provides a method and device for processing data in logistics and distribution, and a courier mobile terminal-based logistics and distribution method and device. The method for processing data in logistics and distribution includes: receiving logistics waybills in a preset time period and analyzing same to obtain delivery information of the logistics waybills; aggregating the logistics waybills according to distance relationships between the delivery address information of the logistics waybills and preset aggregate addresses, to form logistics waybill aggregates; for each logistics waybill aggregate, screening a courier information database according to the delivery information of the logistics waybills included in the logistics waybill aggregate and the preset aggregate address corresponding to the logistics waybill aggregate, to obtain a courier meeting a preset screening condition; and sending information of the logistics waybill aggregates to the courier.