Computer-implemented method, data processing device, computer program product and computer-readable storage medium for detecting global navigation satellite system signal spoofing

• Main Authors: GOMEZ CASCO DIANA, SECO GRANADOS GERARDO, FERNANDEZ HERNANDEZ IGNACIO, LOPEZ SALCEDO JOSE ANTONIO
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

A computer-implemented method for detecting global navigation satellite system (GNSS) signal spoofing. The method comprises: storing (120), at a GNSS receiver, a sequence of samples of a predictable portion and an unpredictable portion of the GNSS signal, where the predictable portion comprises predictable bits and the unpredictable portion comprises unpredictable bits; validating (125) the value of the unpredictable bit from which the unpredictable sample sequence is extracted; calculating (130) first and second partial correlations between an unpredictable, respectively predictable sequence of samples and a locally stored GNSS signal copy; calculating (140) a predefined metric from the composite valued partial correlation; and comparing (150) the predefined metric to a predefined threshold value. In zero-delay recurrent attacks, a spoofer must estimate unpredictable bits introduced by the GNSS authentication protocol and thereby introduce distortion into the signal. The method detects such distortion to ind