2013 Proc. IEEE Global Conf. on Signal and Information Processing,
Dec. 3-5, 2013, Austin, Texas, USA.
A Combined Symmetric Difference and Power Monitoring GNSS Anti-Spoofing Technique
Kyle D. Wesson,
Brian L. Evans and
Todd E. Humphreys
Wireless Networking and Communications Group,
The University of Texas at Austin,
Austin, Texas USA
Radionavigation Security Research at UT Austin
Civil Global Navigation Satellite System (GNSS) signals are vulnerable
to spoofing attacks that deceive a victim receiver into reporting
counterfeit position or time information.
The primary contribution of this paper is a non-cryptographic GNSS
anti-spoofing technique that "sandwiches" a spoofer between a correlation
function distortion monitor and a total in-band power monitor.
The defense exploits the difficulty of mounting an effective spoofing
attack that simultaneously maintains a low-enough counterfeit signal
power to avoid power monitoring alarms while minimizing distortions
of the received crosscorrelation profile that are indicative of a
Results presented in this paper demonstrate the defense's effectiveness
against a sophisticated spoofing attack.
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