This paper proves finite-key BB84 security with leaky receivers, requiring only a fidelity bound on the leaked states, and gives a loss-tolerant penalty for post-measurement outcome leakage.
Security of entanglement-based quantum key distribution with practical detectors
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abstract
We prove the unconditional security of an entanglement-based quantum-key-distribution protocol using detectors that respond to multiple modes of light and cannot distinguish between one from two or more photons. Even with such practical detectors, any defect in the source is automatically detected as an increase in the error rate or in the rate of double clicks.
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Phase-error estimation for quantum key distribution with leaky receivers
This paper proves finite-key BB84 security with leaky receivers, requiring only a fidelity bound on the leaked states, and gives a loss-tolerant penalty for post-measurement outcome leakage.