Joint Communication and Eavesdropper Detection on the Lossy Bosonic Channel

TL;DR

This paper explores a quantum-based system for secure optical fiber communication that simultaneously transmits data and detects eavesdropping, providing a unified model to compare quantum and classical security methods.

Contribution

It introduces a novel quantum communication framework capable of both data transmission and eavesdropper detection on lossy bosonic channels.

Findings

Unified quantum communication and detection model

Comparison of quantum and classical security approaches

Potential for enhanced optical fiber security

Abstract

We study the problem of joint communication and detection of wiretapping on an optical fiber from a quantum perspective. Our system model describes a communication link that is capable of transmitting data under normal operating conditions and raising a warning at the transmitter side in case of eavesdropping. It contributes to a unified modelling approach, based on which established quantum communication paradigms like quantum key distribution can be compared to other approaches offering similar functionality.