One of the challenges in practical quantum key distribution is dealing with efficiency
mismatch between different threshold single-photon detectors. There are known bounds for …

Detection-efficiency mismatch is a common problem in practical quantum key distribution
(QKD) systems. Current security proofs of QKD with detection-efficiency mismatch rely either …

Quantum key distribution (QKD) protocols with threshold detectors are driving high-
performance QKD demonstrations. The corresponding security proofs usually assume that …

The single-photon detectionefficiency of the detector unit is crucial for the security of
common quantum key distribution protocols like Bennett-Brassard 1984 (BB84). A low value …

We prove the security of the Bennett-Brassard (BB84) quantum key distribution protocol in
the case where the key information is encoded in the relative phase of a coherent-state …

Quantum key distribution can be performed with practical signal sources such as weak
coherent pulses. One example of such a scheme is the Bennett-Brassard protocol that can …

Quantum key distribution with the Bennett-Brassard 1984 protocol has been shown to be
unconditionally secure even using weak coherent pulses instead of single-photon signals …

We present a complete protocol for BB84 quantum key distribution for a realistic setting
(noise, loss, multi-photon signals of the source) that covers many of todays experimental …

We propose an efficient method to verify the upper bound of the fraction of counts caused by
multiphoton pulses in practical quantum key distribution using weak coherent light, given …

Quantum key distribution establishes a secret string of bits between two distant parties. Of
concern in weak laser pulse schemes is the especially strong photon number splitting attack …