The Security of Quantum Key Distribution using a Simplified Trusted Relay

Abstract

We propose a QKD protocol for trusted node relays. Our protocol shifts the communication and computational weight of classical post-processing to the end users by reassigning the roles of error correction and privacy amplification, while leaving the exchange of quantum signals untouched. We perform a security analysis for this protocol based on the BB84 protocol on the level of infinite key formulas, taking into account weak coherent implementations involving decoy analysis.

11 pages, 3 figures

References in corpus (3)

• Post-selection technique for quantum channels with applications to quantum cryptography
• Squashing Models for Optical Measurements in Quantum Communication
• Security proof for QKD systems with threshold detectors