Network Architectures for QKD

Abstract

We present two schemes for QKD network architectures based on two ubiquitous topologies: the tree and the ring. Quantum key addressing schemes and their implications are also discussed. IntroductionThe distribution of cryptography keys by exploiting the fundamental laws of quantum mechanics offers an unprecedented degree of network security [1]- [3]. Recent demonstrations have illustrated the feasibility of quantum key distribution (QKD) over conventional optical telecommunications hardware [4]- [6], and even through sufficiently transparent photonic switching devices [7].