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

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.

@article{passah2025_2505.10932,
  title={ Enhanced Multiuser CSI-Based Physical Layer Authentication Based on Information Reconciliation },
  author={ Atsu Kokuvi Angélo Passah and Arsenia Chorti and Rodrigo C. de Lamare },
  journal={arXiv preprint arXiv:2505.10932},
  year={ 2025 }
}