Noisy entanglement-assisted classical capacity as a security framework for two-way quantum key distribution protocols

TL;DR

This paper develops a security framework for Gaussian two-way quantum key distribution protocols using the noisy entanglement-assisted classical capacity, enabling analysis of security against coherent attacks in the asymptotic limit.

Contribution

It introduces a novel security framework based on noisy entanglement-assisted capacity for two-way quantum key distribution protocols.

Findings

Framework effectively models security against coherent attacks

Applicable to Gaussian two-way QKD protocols

Enhances understanding of security limits in quantum communication

Abstract

We use the noisy entanglement-assisted classical capacity formula [arXiv:1609.08592] to create a coherent-attack security framework for Gaussian two-way quantum key distribution protocols in the asymptotic region.