TY - JOUR

T1 - Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks

AU - Gehring, Tobias

AU - Händchen, Vitus

AU - Duhme, Jörg

AU - Furrer, Fabian

AU - Franz, Torsten

AU - Pacher, Christoph

AU - Werner, Reinhard F.

AU - Schnabel, Roman

N1 - Funding information: This research was supported by the Deutsche Forschungsgemeinschaft (projects SCHN 757/5-1 and WE 1240/20-1), the Centre for Quantum Engineering and Space-Time Research and the Vienna Science and Technology Fund (WWTF; project ICT10-067 (HiPANQ)). T.G. and V.H. thank the IMPRS on Gravitational Wave Astronomy for support. T.G. also acknowledges support from the H.C. Ørsted postdoctoral programme. F.F. acknowledges support from Japan Society for the Promotion of Science by KAKENHI grant no. 24-02793. C.P. would like to thank Gottfried Lechner for very helpful conversations. R.F.W. acknowledges support from the European network SIQS.

PY - 2015/10/30

Y1 - 2015/10/30

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84946147143&partnerID=8YFLogxK

U2 - 10.1038/ncomms9795

DO - 10.1038/ncomms9795

M3 - Article

VL - 6

SP - 8795

JO - Nature Comm.

JF - Nature Comm.

M1 - 8795

ER -