The GNSS community is dedicating significant effort to protect applications from harmful interference, including spoofing. As part of this effort, Europe will authenticate the Galileo Open Service message and is currently evaluating authentication schemes for EGNOS. This article presents the main results of recent EU activities on EGNOS authentication. After presenting some examples that illustrate the importance of authenticating SBAS, this article describes the main drivers for SBAS authentication design, namely, the use of I and/or Q channels, the use of the L1 and/or L5 frequencies, the authentication latency, and the cryptographic parameters. Later, the article presents the performances of EC‐Schnorr and TESLA data authentication schemes and analyzes their impact in the SBAS L1 message sequence and in the L1/L5 Dual Frequency Multi‐Constellation Standard message sequence, currently under development.
(UAB) and head of the Signal Processing for Navigation and Communications (SPCOMNAV) group. Previoulsy, he was staff member at the Radionavigation Section in ESTEC/ESA, and involved in the Galileo project and in the development of GNSS receivers and applications. Eckart Göhler received his Diploma in physics from the University Tübingen and his Ph.D. from the Institute for Astronomy and Astrophysics, Tübingen. He worked as a lead software engineer at IFEN GmbH in the receiver technology department. Today he is employed at OHB System AG in the instrument software group.
This paper describes a secure framework for tracking applications that use the Galileo signal authentication services. First a number of limitations that affect the trust of critical tracking applications, even in presence of authenticated GNSS signals, are detailed. Requirements for secure tracking are then introduced; detailing how the integrity characteristics of the Galileo authentication could enhance the security of active tracking applications. This paper concludes with a discussion of our existing tracking technology using a Siemens TC45 GSM/GPRS module and future development utilizing our previously proposed trusted GNSS receiver.
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