Security of trusted repeater quantum key distribution networks

Authors:
Louis Salvail;Momtchil Peev;Eleni Diamanti;Romain Alléaume;Norbert Lütkenhaus;Thomas Länger
Affiliations:
Université de Montréal, Montréal, Canada;Austrian Research Centers GmbH - ARC, Vienna, Austria;Laboratoire Charles Fabry de l'Institut d'Optique, Palaiseau, France and Telecom ParisTech & LTCI-CNRS, Paris, France;Telecom ParisTech & LTCI-CNRS, Paris, France;University Erlangen-Nuremberg, Erlangen, Germany and Institute for Quantum Computing, University of Waterloo, Waterloo, Canada;Austrian Research Centers GmbH - ARC, Vienna, Austria
Venue:
Journal of Computer Security - EU-Funded ICT Research on Trust and Security
Year:
2010

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Abstract

A Quantum Key Distribution (QKD) network is an infrastructure capable of performing long-distance and high-rate secret key agreement with information-theoretic security. In this paper we study security properties of QKD networks based on trusted repeater nodes. Such networks can already be deployed, based on current technology. We present an example of a trusted repeater QKD network, developed within the SECOQC project. The main focus is put on the study of secure key agreement over a trusted repeater QKD network, when some nodes are corrupted. We propose an original method, able to ensure the authenticity and privacy of the generated secret keys.