TDOA Source-Localization Technique Robust to Time-Synchronization Attacks
نویسندگان
چکیده
In this paper, we focus on the localization of a passive source from time difference arrival (TDOA) measurements. TDOA values are computed with respect to pairs fixed sensors that required be accurately time-synchronized. This constitutes weakness as all synchronization techniques vulnerable delay injections. Attackers able either spoof signal or inject asymmetric delays in communication channel. By nature, measurements highly sensitive time-synchronization offsets between sensors. Our first contribution is show timing attacks can severely affect process. With few microseconds injected one sensor, resulting estimate might several kilometers away true location unknown source. We also residual analysis does not enable detection and identification attacks. second propose two-step TDOA-localization technique robust against It uses known define weight for each pair sensors, reflecting confidence their synchronization. solution then weighted least-squares estimator newly created weights received As result, our method identifies network being too corrupt localize, gives corrected position along metric. Numerical results illustrate performance technique.
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ژورنال
عنوان ژورنال: IEEE Transactions on Information Forensics and Security
سال: 2021
ISSN: ['1556-6013', '1556-6021']
DOI: https://doi.org/10.1109/tifs.2020.3001741