Prototype of Secure Wire-Line Telephone

TL;DR

This paper introduces a secure wire-line telephone system utilizing physical layer security with artificial noise, analyzed theoretically and experimentally, to enhance communication security against wiretapping.

Contribution

It proposes a novel secure wire-line telephone system that employs artificial noise and hybrid circuits, with comprehensive analysis and experimental validation of its secrecy capacity.

Findings

Significantly improves communication security against wiretapping.

Theoretical analysis confirms high secrecy capacity.

Experimental results validate system robustness and effectiveness.

Abstract

This paper presents a secure wire-line telephone system that employs physical layer security (PLS) to protect against wiretapping. The system generates artificial noise (AN) in both transmission directions and uses a telephone hybrid circuit to effectively suppress the AN for the purpose of secure communication. Furthermore, we analyze the secrecy capacity of the system and evaluate its performance through theoretical analysis and practical experiments. The results demonstrate that the proposed system can significantly enhance communication security while preserving the integrity of legitimate signals. The results also validate that the proposed system is a robust and effective solution for securing wire-line telephone communications.