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Optical Fiber Communication Conference

Components for quantum cryptography

Hugo Zbinden, G. Ribordy, Damien Stucki

Published Jan 1, 2006• 0 citations
Publisher

Abstract

We demonstrate a new protocol for practical quantum cryptography, tailored for a high key generation rate using weak coherent pulses. We discuss the required features of the optical key components of the system
DOI
10.1109/ofc.2006.215484

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We present and demonstrate a new protocol for practical quantum cryptography, tailored for an implementation with weak coherent pulses to obtain a high key generation rate. The key is obtained by a simple time-of-arrival measurement on the dataline; the presence of an eavesdropper is checked by an interferometer on an additional monitoring line. The setup is experimentally simple; moreover, it is tolerant to reduced interference visibility and to photon number splitting attacks, thus featuring a high efficiency in terms of distilled secret bit per qubit.
We present and demonstrate a new protocol for practical quantum cryptography, tailored for an implementation with weak coherent pulses to obtain a high key generation rate. The key is obtained by a simple time-of-arrival measurement on the dataline; the presence of an eavesdropper is checked by an interferometer on an additional monitoring line. The setup is experimentally simple; moreover, it is tolerant to reduced interference visibility and to photon number splitting attacks, thus featuring a high efficiency in terms of distilled secret bit per qubit.
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