Transmission Line Identification Via Impedance Inhomogeneity Pattern
This paper reports a new physical unclonable function (PUF) technology, namely, transmission line (TX-Line) PUF. We experimentally showed that using the intrinsic impedance inhomogeneity pattern, variation of characteristic impedance over distance, of any TX-Line, one can identify the TX-Line with high verification accuracy. The TX-Line PUF information can be extracted using either frequency domain reflectometry (FDR) or time domain reflectometry (TDR) methods. A coaxial cable as short as 2 cm was identified with an equal error rate (EER) of below 0.1%. The impact of TX-Line length, interrogation bandwidth, and environmental change toward the TX-Line PUF were experimentally studied. Different TX-Line PUF comparison algorithms were proposed and studied. A homodyne detection instrument was built to extract TX-Line PUF. A TDR-based PUF extraction method was also demonstrated. Twisted pair TX-Line PUF was demonstrated with similar performance as coaxial cable TX-Line PUF.
T. Wei and J. Huang, "Transmission Line Identification Via Impedance Inhomogeneity Pattern," IEEE Journal of Radio Frequency Identification, vol. 3, no. 4, pp. 245-251, Institute of Electrical and Electronics Engineers (IEEE), Dec 2019.
The definitive version is available at https://doi.org/10.1109/JRFID.2019.2920111
Electrical and Computer Engineering
Intelligent Systems Center
Keywords and Phrases
Physical Unclonable Function; Transmission Line Identification; Impedance Inhomogeneity
International Standard Serial Number (ISSN)
Article - Journal
© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Dec 2019