Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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  • Author: Gehring, Tobias

    Quantum Physics and Information Techology, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kgs. Lyngby, Denmark

  • Author: Haendchen, Vitus

    Max-Planck-Institut für Gravitationsphysik, Germany

  • Author: Duhme, Joerg

    Leibniz Universität Hannover, Germany

  • Author: Furrer, Fabian

    University of Tokyo, Japan

  • Author: Franz, Torsten

    Leibniz Universität Hannover, Germany

  • Author: Pacher, Christoph

    Austrian Institute of Technology, Austria

  • Author: Werner, Reinhard F.

    Leibniz Universität Hannover, Germany

  • Author: Schnabel, Roman

    Leibniz Universität Hannover, Germany

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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.
Original languageEnglish
Article number8795
JournalNature Communications
Volume6
Number of pages7
ISSN2041-1723
DOIs
Publication statusPublished - 2015
CitationsWeb of Science® Times Cited: No match on DOI

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