Realizing a Downstream-Access Network Using Continuous-Variable Quantum Key Distribution

Quantum key distribution (QKD), which enables the secure of symmetric keys between two legitimate parties, is highly useful in future network security. An access that connects multiple end users with one backbone can be combined QKD to build security for a scalable and cost-effective way. In this paper, we show downstream-access implemented using continuous-variable (CV) QKD. The analysis conducted independently other nodes, greatly relax trustfulness requirement on nodes. then obtained against parties even when quantum signals are broadcast throughout network. passive beam splitter sufficient deterministically distribute signals, standard CV systems directly fitted network, makes it more applicable practical implementations. Numerous simulation results provided demonstrate performance where up 64 shown feasible We provide security-analysis framework realizing will boost diversity constructing networks.