We present a simplified BB84 protocol with only three quantum states and one decoy-state level. We implement this scheme using the polarization degree of freedom at telecom wavelength. Only one pulsed laser is used in order to reduce possible side-channel attacks. The repetition rate of 625 MHz and the achieved secret bit rate of 23 bps over 200 km of standard fiber are the actual state of the art.
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Research Article| January 31 2018
Simple and high-speed polarization-based QKD
Fadri Grünenfelder, Alberto Boaron, Davide Rusca, Anthony Martin, Hugo Zbinden; Simple and high-speed polarization-based QKD. Appl. Phys. Lett. 29 January 2018; 112 (5): 051108. https://doi.org/10.1063/1.5016931
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