Enhanced Multiuser CSI-Based Physical Layer Authentication Based on Information Reconciliation

TL;DR

This paper introduces an improved physical layer authentication method for multiuser systems using Polar codes and information reconciliation, significantly boosting detection accuracy in low-end IoT networks.

Contribution

It proposes a novel Polar code-based information reconciliation scheme with a quantization strategy for enhanced physical layer authentication performance.

Findings

Achieves over 99.80% increase in detection probability

Outperforms existing approaches in multiuser PLA

Effective for low-end IoT network security

Abstract

This paper presents a physical layer authentication (PLA) technique using information reconciliation in multiuser communication systems. A cost-effective solution for low-end Internet of Things networks can be provided by PLA. In this work, we develop an information reconciliation scheme using Polar codes along with a quantization strategy that employs an arbitrary number of bits to enhance the performance of PLA. We employ the principle of Slepian-Wolf coding to reconcile channel measurements spread in time. Numerical results show that our approach works very well and outperforms competing approaches, achieving more than 99.80% increase in detection probability for false alarm probabilities close to 0.