Long distance decoy state quantum key distribution in optical fiber

Details Long distance decoy state quantum key distribution in optical fiber Long distance decoy state quantum key distribution in optical fiber

2006-07-26

arxiv.org/abs/quant-ph/0607186v2

Phys. Rev. Lett. 98 010503 (2007)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.98.010503

The theoretical existence of photon-number-splitting attacks creates a security loophole for most quantum key distribution (QKD) demonstrations that use a highly attenuated laser source. Using ultra-low-noise, high-efficiency transition-edge sensor photodetectors, we have implemented the first version of a decoy-state protocol that incorporates finite statistics without the use of Gaussian approximations in a one-way QKD system, enabling the creation of secure keys immune to photon-number-splitting attacks and highly resistant to Trojan horse attacks over 107 km of optical fiber.

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