Long distance decoy state quantum key distribution in optical fiber

Abstract

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.

4 pages, 3 figures

References in corpus (3)

• Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
• Long-distance quantum key distribution in optical fiber
• Unconditionally secure quantum key distribution over 50km of standard telecom fibre

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• Experimental Decoy Quantum Key Distribution Up To 130KM Fiber
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• Quantum cryptography: theory and practice
• Upper bounds for the secure key rate of decoy state quantum key distribution