Spoofing Detection via GNSS-Inertial Position Discrepancy
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Solution Overview
Problem
Current vehicle positioning systems are vulnerable to signal spoofing attacks, which can lead to dangerous situations and accidents due to the lack of effective anti-spoofing technology, particularly in civilian GPS systems that lack authentication or encryption measures.
Innovation Solution
A method and system for detecting spoofed position signals by receiving and comparing position signals from various sensors, including GNSS, LIDAR, and IMU, to determine discrepancies and generate alerts when differences exceed predetermined tolerances, using redundant reference signals from different sources to verify authenticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If civilian GPS signals are used for vehicle positioning, then ease of operation is improved, but reliability deteriorates due to lack of authentication or encryption measures against spoofing attacks
Solution Approach 1:
The system performs preliminary verification of GPS signal authenticity by comparing received position signals with expected position data calculated from previous position and vehicle speed before using the signals for navigation, preventing spoofed signals from causing harmful effects
Solution Approach 2:
The system continuously monitors the consistency between GPS-derived position and inertial navigation system-derived position, providing feedback to detect discrepancies that indicate spoofing attacks and triggering alerts or alternative positioning methods
2Reliability
If redundant reference signals from multiple sources are used to verify position signal authenticity, then reliability is improved, but device complexity increases
Solution Approach 1:
The system uses the inertial navigation system to serve multiple functions: providing position verification for GPS spoofing detection and providing continuous positioning capability when GPS signals are unavailable or spoofed, reducing the need for separate dedicated anti-spoofing hardware
Solution Approach 2:
The inertial navigation system acts as an intermediary reference that mediates between the GPS receiver and the navigation decision-making process, providing an independent verification mechanism without requiring direct modification of the GPS hardware
Data Source
AI summary
A method and system for detecting signal spoofing are disclosed. According to certain embodiments, the spoofing detection method may include receiving one or more position signals indicative of a first position of a vehicle at a first time. The method may also include receiving one or more reference signals indicative of a second position of the vehicle at the first time. The method may also include determining a difference between the first position and the second position. The method may also include determining that the difference is above a predetermined tolerance. The method may further include notifying the vehicle positioning system.