Efficient reconciliation protocol for discrete-variable quantum key distribution

Abstract

Reconciliation is an essential part of any secret-key agreement protocol and hence of a Quantum Key Distribution (QKD) protocol, where two legitimate parties are given correlated data and want to agree on a common string in the presence of an adversary, while revealing a minimum amount of information. In this paper, we show that for discrete-variable QKD protocols, this problem can be advantageously solved with Low Density Parity Check (LDPC) codes optimized for the BSC. In particular, we demonstrate that our method leads to a significant improvement of the achievable secret key rate, with respect to earlier interactive reconciliation methods used in QKD.

References in corpus (4)

• Quantum cryptography with finite resources: unconditional security bound for discrete-variable protocols with one-way post-processing
• Multidimensional reconciliation for continuous-variable quantum key distribution
• Low Cost and Compact Quantum Cryptography
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