Cooperative GPS Signal Authentication from Unreliable Peers

Liang Heng, Daniel Chou, and Grace Xingxin Gao

Peer Reviewed

Abstract:	Secure, reliable position and time information is indispensable for many civil GPS applications such as guiding aircraft, tracking freight, synchronizing power grids and cellular networks, and time-stamping financial transactions. This paper introduces a signal authentication architecture based on a network of cooperative receivers. A receiver in the network correlates its received military P(Y) signal with those received by other receivers (hereinafter referred to as cross-check receivers) so as to detect spoofing attacks. This paper describes a candidate structures to implement this architecture. Our theoretical analysis shows that the signal-to-noise-ratio significantly aspects pair-wise check performance, and the final authentication performance improves exponentially with increasing number of cross-check receivers. We have conducted two field experiments to evaluate pair-wise check performance in different spatial conditions (urban canyon and open space) and different transport modes (static and moving). The experiments shows that pair-wise check performance is sensitive to spatial conditions, but insensitive to transport modes.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	2801 - 2809
Cite this article:	Heng, Liang, Chou, Daniel, Gao, Grace Xingxin, "Cooperative GPS Signal Authentication from Unreliable Peers," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 2801-2809.
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