A specific implementation of navigation message authentication (NMA) for civil GPS anti-spoofing is proposed. The notion of GNSS signal authentication is defined in probabilistic terms. This work proposes a practical, backward-compatible NMA strategy for the civil L2/L5 civil navigation (CNAV) message. The proposal is sufficiently detailed to facilitate near-term implementation of security-hardened civil GPS.

Cite and download the paper:
Wesson, K.D., M.P. Rothlisberger, and T.E. Humphreys, "A Proposed Navigation Message Authentication Implementation for Civil GPS Anti-Spoofing," Proceedings of ION GNSS, Portland, Oregon, 2011.

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