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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Gehring T,Händchen V,Duhme J,Furrer F,Franz T,Pacher C,Werner RF,Schnabel R

doi

10.1038/ncomms9795

subject

Has Abstract

pub_date

2015-10-30 00:00:00

pages

8795

issn

2041-1723

pii

ncomms9795

journal_volume

6

pub_type

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