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 condu...

Abstract Distributing cryptographic keys over public channels in a way that can provide information-theoretic security is the holy grail for secure communication. This be achieved by exploiting quantum mechanical principles so-called key distribution (QKD). Continuous-variable (CV) QKD based on coherent states, particular, an attractive scheme communication since it requires only standard telec...