Error estimation at the information reconciliation stage of quantum key distribution

Abstract

Quantum key distribution (QKD) offers a practical solution for secure communication between two distinct parties via a quantum channel and an authentic public channel. In this work, we consider different approaches to the quantum bit error rate (QBER) estimation at the information reconciliation stage of the post-processing procedure. For reconciliation schemes employing low-density parity-check (LDPC) codes, we develop a novel syndrome-based QBER estimation algorithm. The algorithm suggested is suitable for irregular LDPC codes and takes into account punctured and shortened bits. Testing our approach in a real QKD setup, we show that an approach combining the proposed algorithm with conventional QBER estimation techniques allows one to improve the accuracy of the QBER estimation.

arXiv comment6 pages, 2 figures

References in corpus (9)

• Quantum Cryptography
• Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer
• Secure Quantum Key Distribution
• Practical challenges in quantum key distribution
• Symmetric blind information reconciliation for quantum key distribution
• Post-processing procedure for industrial quantum key distribution systems
• Improved construction of irregular progressive edge-growth Tanner graphs
• Quantum-secured data transmission in urban fibre-optic communication lines
• Symmetric blind information reconciliation and hash-function-based verification for quantum key distribution

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• Asymmetric adaptive LDPC-based information reconciliation for industrial quantum key distribution
• Multi-matrix rate-compatible reconciliation for quantum key distribution
• 100Mbps Reconciliation for Quantum Key Distribution Using a Single Graphics Processing Unit