Improving the performance of twin-field quantum key distribution

Performance of two quantum-key-distribution protocols

We compare the performance of Bennett-Brassard 1984 BB84 and Scarani-Acin-Ribordy-Gisin 2004 SARG04 protocols, the latter of which was proposed by V. Scarani et al. Phys. Rev. Lett. 92, 057901 2004 . Specifically, in this paper, we investigate the SARG04 protocol with two-way classical communications and the SARG04 protocol with decoy states. In the first part of the paper, we show that the SAR...

Key Reconciliation for High Performance Quantum Key Distribution

Quantum Key Distribution is carving its place among the tools used to secure communications. While a difficult technology, it enjoys benefits that set it apart from the rest, the most prominent is its provable security based on the laws of physics. QKD requires not only the mastering of signals at the quantum level, but also a classical processing to extract a secret-key from them. This postpro...

Improving efficiency of quantum key distribution with probabilistic measurements

The first part of this paper presents two efficient cryptographic protocols, based on quantum entanglement, for secure exchange of secret keys. While the first protocol requires storage of entangled qubits, the second protocol has no storage requirements and presents a probabilistic model. We show that there is a tradeoff between security against eavesdropping and the efficiency of the protocol...

Performance of photon-pair quantum key distribution systems

We analyze the quantitative improvement in performance provided by a novel quantum key distribution (qkd) system that employs a correlated photon source (cps) and a photon-number resolving detector (pnr). Our calculations suggest that given current technology, the cps/pnr implementation offers an improvement of several orders of magnitude in secure bit rate over previously described implementat...

Quantum Key Distribution