Georeferencing Certification via Server-Side GNSS Signal Verification
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Solution Overview
Problem
Current mobile devices with GNSS sensors face unreliable detection of GNSS signals due to spoofing, where fake signals can be easily manipulated, and existing anti-spoofing methods are either too complex or not feasible for devices with limited processing power and memory.
Innovation Solution
A georeferencing certification method and system where a certification server compares high-level and low-level GNSS data from mobile devices with its own acquired data, using anti-spoofing techniques to verify the authenticity of signals, including direction, power, and encryption checks, to issue a secure georeferencing certificate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing anti-spoofing methods are implemented on mobile devices, then security against spoofing attacks is improved, but device complexity and processing requirements increase beyond what mobile devices can handle
Solution Approach 1:
The patent introduces a certification server as an intermediary between the mobile device and the GNSS signal source. The server performs complex anti-spoofing verification by comparing satellite ephemeris data, signal characteristics, and position calculations, thereby transferring the computational burden of security verification from the mobile device to the server while maintaining security against spoofing attacks
Solution Approach 2:
The system segments the anti-spoofing functionality into two parts: the mobile device collects and transmits raw GNSS data, while the certification server performs the complex verification and comparison operations. This segmentation allows each component to operate within its capability constraints while achieving overall system security
2Measurement precision
If comprehensive GNSS data collection and verification is performed, then positioning accuracy is improved, but processing time and energy consumption increase
Solution Approach 1:
The certification server pre-acquires and stores satellite ephemeris data and signal characteristics in advance. When a mobile device requests verification, the server already has the reference data ready for comparison, eliminating the need for real-time data collection and reducing verification time while maintaining positioning accuracy
Data Source
AI summary
The present invention relates to a georeferencing certification method actuated by means of a central unit with one or more GNSS sensors and one or more mobile devices which request the georeferencing. The mobile device will collect the information monitored by the GNSS sensor installed on the mobile device and send it to the central unit, which will compare the information received with that which it has acquired through its relative GNSS sensors. The result of the comparison will authorise, or not, the unit to issue the georeferencing certification.