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Civil Global Navigation Satellite Systems (GNSS) such as the Global Positioning System (GPS) broadcast unencrypted signals worldwide according to an open-access standard. The transparency and predictability of these signals render them easy to counterfeit, or spoof. Counterfeit GNSS signals can deceive a receiver into reporting spoofer-controlled position or time. Given integration of civil GNSS into critical national infrastructure and safety-of-life applications, a successful spoofing attack could have significant consequences. As a defense against spoofing attacks, military GNSS employs symmetric-key encryption, which is impractical for civil GNSS. In this dissertation, the author proposed a new navigation and timing security approach that avoids operating with a locally stored secret key while maintaining a high resistance to spoofing. The contributions are: (1) probabilistic framework for signal authentication, (2) asymmetric-key cryptographic signal authentication technique, and (3) noncryptographic spoofing detection technique. These techniques are viable spoofing defenses for civil users.
|Nominations Open for 2021 SPS Awards||1 September 2021|
|Call for Nominations: Awards Board and Nominations & Appointments Committee||24 September 2021|
|Meet the 2021 Candidates: IEEE President-Elect||1 October 2021|
|Call for Nominations for Editor-in-Chief, Open Journal of Signal Processing||1 October 2021|
|Election of President-Elect, Regional Directors-at-Large and Members-at-Large||1 October 2021|
|Call for Nominations: SPS Chapter of the Year Award||15 October 2021|
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