Classical noise, Quantum noise and Secure communication

TL;DR

This paper explores how classical and quantum noise influence secure communication, comparing traditional spread-spectrum methods with quantum entanglement techniques, emphasizing the photon’s role in unifying these approaches.

Contribution

It provides a unified theoretical framework linking classical and quantum noise in secure communication, highlighting the photon’s central role and discussing fluctuation dissipation theorems.

Findings

Classical and quantum noise can be described using fluctuation dissipation theorems.

Quantum entanglement offers a distinct route for secure communication.

Photon plays a unifying role in classical and quantum noise descriptions.

Abstract

Secure communication based on message encryption might be performed by combining the message with controlled noise (called pseudo-noise) as performed in Spread-Spectrum communication used presently in Wi-Fi and Smartphone Telecommunication systems. Quantum communication based on entanglement is another route for securing communications as demonstrated by several important experiments described in this work. The central role played by the photon in unifying the description of Classical and Quantum noise as major ingredients of secure communication systems is highlighted and described on the basis of the classical and quantum fluctuation dissipation theorems.