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Physical Layer Authentication With Channel Knowledge Maps...
[Submitted on 25 Jun 2026] · 2026-06-26 · via cs updates on arXiv.org

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Abstract:Physical layer authentication (PLA) allows to authenticate the user by comparing measurements over time, assuming their time consistency or by modeling their evolution. However, these assumptions become problematic when devices are in motion and in indoor environments due to multipath propagation and obstructions. In this paper, we propose a PLA mechanism for moving devices in indoor environments, where multiple access points (APs) estimate the dominant channel tap path loss (PL) and angle of arrival (AoA) from the received signals and compare them with previously collected channel knowledge maps (CKMs). Specifically, the measurements are compared to those in the neighborhood of the previously known position obtained from CKMs. A comprehensive security analysis is conducted under both random and optimal attacks. Numerical results in a representative indoor scenario, with CKM obtained via ray tracing, validate the effectiveness of the proposed PLA approach.

Submission history

From: Francesco Ardizzon [view email]
[v1] Thu, 25 Jun 2026 13:51:04 UTC (500 KB)