Title: Authentication Concepts for Satellite-Based Augmentation Systems
Author(s): Andrea Dalla Chiara, Giacomo Da Broi, Oscar Pozzobon, Silvia Sturaro, Gianluca Caparra, Nicola Laurenti, Javier Fidalgo, Miguel Odriozola, José Caro Ramon, Ignacio Fernandez-Hernandez, Eric Chatre
Published in: Proceedings of the 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016)
September 12 - 16, 2016
Oregon Convention Center
Portland, Oregon
Pages: 3208 - 3221
Cite this article: Chiara, Andrea Dalla, Broi, Giacomo Da, Pozzobon, Oscar, Sturaro, Silvia, Caparra, Gianluca, Laurenti, Nicola, Fidalgo, Javier, Odriozola, Miguel, Ramon, José Caro, Fernandez-Hernandez, Ignacio, Chatre, Eric, "Authentication Concepts for Satellite-Based Augmentation Systems," Proceedings of the 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016), Portland, Oregon, September 2016, pp. 3208-3221.
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Abstract: The main focus of Satellite-Based Augmentation Systems has been the provision of integrity to the GNSS signals. However, the sensibility towards interference is growing within the GNSS community, as it becomes day by day more realistic, more feasible and cheaper. The purpose of this paper is to present a framework for designing SBAS authentication and to present innovative solutions. The paper will initially outline the threats to be mitigated, with emphasis on those specific to SBAS. The work will then focus on signals and signal components that could support authentication, its adequacy and the margin of maneuver for implementation. Subsequently, the paper will present some authentication approaches and discuss their adequacy for the SBAS service. Finally, the paper will discuss the impact of authentication for the SBAS users. Finally, some concrete implementation proposals will be presented and its bit-level implementation and their performance will be characterized, concluding with some recommendations. The paper is based on the activities of the EAST project (EGNOS Authentication Security Testbed), therefore most of the considerations are based on the European SBAS service EGNOS.