Security of quantum key distribution with detection-efficiency mismatch in the multiphoton case
arXiv:2004.07809 · doi:10.22331/q-2022-07-22-771
Abstract
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 on the assumption of the single-photon light source on the sender side or on the assumption of the single-photon input of the receiver side. These assumptions impose restrictions on the class of possible eavesdropping strategies. Here we present a rigorous security proof without these assumptions and, thus, solve this important problem and prove the security of QKD with detection-efficiency mismatch against general attacks (in the asymptotic regime). In particular, we adapt the decoy state method to the case of detection-efficiency mismatch.
29 pages, 4 figures; v3: significantly revised version: more detailed explanations and proofs to improve readability
References in corpus (8)
- Distillation of secret key and entanglement from quantum states
- Improved key rate bounds for practical decoy-state quantum key distribution systems
- Squashing Models for Optical Measurements in Quantum Communication
- Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch
- Security proof for QKD systems with threshold detectors
- Security proof of practical quantum key distribution with detection-efficiency mismatch
- Generalised entropy accumulation
- Multiphoton and side-channel attacks in mistrustful quantum cryptography
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