2013 Proc. Asilomar Conference on Signals, Systems and Computers
A Probabilistic Framework for Global Navigation Satellite Signal Timing Assurance
Brian L. Evans and
Todd E. Humphreys
Wireless Networking and Communications Group,
The University of Texas at Austin,
Austin, TX 78712 USA
Paper Draft -
Radionavigation Security Research at UT Austin
Global Navigation Satellite System (GNSS) signals
serve as a worldwide timing reference in numerous technological
sectors. Yet GNSS receivers are vulnerable to so-called spoofing
attacks that can manipulate the time reference. We illustrate
the need for a probabilistic security model in the context of
authenticating a timing signal as opposed to the traditionally
non-probabilistic security models of message authentication and
cryptography. Our primary contribution is establishing the necessary
conditions for timing assurance in the context of securityenhanced
GNSS signals. In addition, we formulate a probabilistic
framework for timing assurance that combines cryptography and
statistical signal processing across multiple network layers.
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Last Updated 11/25/13.