2015 | OriginalPaper | Chapter
A Comparison of PHY-Based Fingerprinting Methods Used to Enhance Network Access Control
Authors : Timothy J. Carbino, Michael A. Temple, Juan Lopez Jr.
Published in: ICT Systems Security and Privacy Protection
Publisher: Springer International Publishing
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Network complexity continues to evolve and more robust measures are required to ensure network integrity and mitigate unauthorized access. A physical-layer (PHY) augmentation to Medium Access Control (MAC) authentication is considered using PHY-based Distinct Native Attribute (DNA) features to form device fingerprints. Specifically, a comparison of waveform-based Radio Frequency DNA (RF-DNA) and Constellation-Based DNA (CB-DNA) fingerprinting methods is provided using unintentional Ethernet cable emissions for 10BASE-T signaling. For the first time a direct comparison is achievable between the two methods given the evaluation uses the same experimentally collected emissions to generate RF-DNA and CB-DNA fingerprints. RF-DNA fingerprinting exploits device dependent features derived from instantaneous preamble responses within communication bursts. For these same bursts, the CB-DNA approach uses device dependent features derived from mapped symbol clusters within an adapted two-dimensional (2D) binary constellation. The evaluation uses 16 wired Ethernet devices from 4 different manufacturers and both Cross-Model (manufacturer) Discrimination (CMD) and Like-Model (serial number) Discrimination (LMD) is addressed. Discrimination is assessed using a Multiple Discriminant Analysis, Maximum Likelihood (MDA/ML) classifier. Results show that both RF-DNA and CB-DNA approaches perform well for CMD with average correct classification of
$$\%C$$
=90% achieved at Signal-to-Noise Ratios of
$$SNR\ge 12.0$$
dB. Consistent with prior related work, LMD discrimination is more challenging with CB-DNA achieving
$$\%C$$
=90.0% at
$$SNR$$
=
$$22.0$$
dB and significantly outperforming RF-DNA which only achieved
$$\%C$$
=56.0% at this same
$$SNR$$
.