Beyond Point-to-Point Quantum Key Distribution

Tapster, Gorman, Benton +3 more

P. Toliver, Robert J. Runser, Thomas E. Chapuran +11 more

Quantum key distribution (QKD) enables unconditional physical layer security for the distribution of cryptographic key material. However, most experimental demonstrations have relied on simple point-to-point optical links. In this paper we investigate the compatibility of QKD with reconfigurable optical networks. By performing the first tests of QKD transmission through optical switches, we study if there are impairment mechanisms other than switch insertion loss that impact the sifted and error corrected secret bit yield. Three types of transparent optical switch elements are investigated including lithium niobate (LiNbO/sub 3/), microelectromechanical systems (MEMS), and optomechanical. We show that QKD can be extended beyond point-to-point links to switched multinode architectures including protected ring networks to enhance quantum channel availability.

A. Pagano, Roberto Mercinelli, Maurizio Valvo +1 more

This paper reports the network operator point of view about the introduction of quantum key distribution (QKD) in optical networks to secure the data plane and/or specific applications, focusing on the design aspects that go beyond pure transmission. The functional architecture of a quantum key distribution network is depicted focusing on the integration in the existing telecommunications infrastructure. Some use cases of the utilization of the QKD layer, presenting results from in-field demonstrations, are reported together with a technology agnostic numerical model about resource sharing in a metropolitan area network environment.

Masahiro Takeoka

A. Pagano, Roberto Mercinelli, Maurizio Valvo +1 more

This paper reports a network operator point of view about the introduction of Quantum Key Distribution in optical networks to secure the data plane and/or specific applications, focusing on the aspects that go beyond pure transmission.

Norbert Lütkenhaus