Fast and simple one-way Quantum Key Distribution

Details Fast and simple one-way Quantum Key Distribution Fast and simple one-way Quantum Key Distribution

2005-06-13

arxiv.org/abs/quant-ph/0506097v1

Appl. Phys. Lett. 87, 194108 (2005)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1063/1.2126792

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 data line; 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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