title: Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks.
abstract: Secret communication over public channels is one of the central pillars of a modern information society. Using quantum key distribution this is achieved without relying on the hardness of mathematical problems, which might be compromised by improved algorithms or by future quantum computers. State-of-the-art quantum key distribution requires composable security against coherent attacks for a finite number of distributed quantum states as well as robustness against implementation side channels. Here we present an implementation of continuous-variable quantum key distribution satisfying these requirements. Our implementation is based on the distribution of continuous-variable Einstein-Podolsky-Rosen entangled light. It is one-sided device independent, which means the security of the generated key is independent of any memoryfree attacks on the remote detector. Since continuous-variable encoding is compatible with conventional optical communication technology, our work is a step towards practical implementations of quantum key distribution with state-of-the-art security based solely on telecom components.
authors.affiliation: Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), and Institut für Gravitationsphysik Leibniz Universität Hannover, Callinstraße 38, 30167 Hannover, Germany.|Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kongens Lyngby, Denmark.
authors.forename: Tobias
authors.initials: T
authors.lastname: Gehring
authors.affiliation: Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), and Institut für Gravitationsphysik Leibniz Universität Hannover, Callinstraße 38, 30167 Hannover, Germany.|Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Vitus
authors.initials: V
authors.lastname: Händchen
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Duhme
authors.affiliation: Department of Physics, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Fabian
authors.initials: F
authors.lastname: Furrer
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.|Institut für Fachdidaktik der Naturwissenschaften, Technische Universität Braunschweig, Bienroder Weg 82, 38106 Braunschweig, Germany.
authors.forename: Torsten
authors.initials: T
authors.lastname: Franz
authors.affiliation: AIT Austrian Institute of Technology GmbH, Digital Safety &Security Department, Optical Quantum Technology, Donau-City-Straße 1, 1200 Vienna, Austria.
authors.forename: Christoph
authors.initials: C
authors.lastname: Pacher
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.
authors.forename: Reinhard F
authors.initials: RF
authors.lastname: Werner
authors.affiliation: Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), and Institut für Gravitationsphysik Leibniz Universität Hannover, Callinstraße 38, 30167 Hannover, Germany.|Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Roman
authors.initials: R
authors.lastname: Schnabel