A classical attack on the coherent one way protocol for quantum key distribution

TL;DR

This paper introduces a classical attack method that can retrieve secure keys from the coherent one way quantum key distribution protocol without intercepting the quantum communication.

Contribution

It presents a novel classical attack strategy that challenges the assumed security of the coherent one way quantum key distribution protocol.

Findings

The attack can successfully extract keys without reading transmitted quantum information.

The security of the protocol may be compromised under this attack.

The method highlights potential vulnerabilities in quantum key distribution protocols.

Abstract

We propose a way to retrieve the secure key generated by the coherent one way protocol without reading the information transmitted on the quantum channel.