GNSS Anti-Spoofing Mesh
Cross-Drone GNSS Integrity Verification
A single drone cannot reliably distinguish between a genuine GNSS signal and a spoofed one using onboard receivers alone. The MASGM engine (M223) coordinates position plausibility checks across a mesh of drones: each node submits a hashed position commitment rather than raw GPS coordinates, and the mesh verifies triangulation consistency to identify implausible position claims consistent with GNSS spoofing injection.
Capability specification
- 01
Multi-node position plausibility mesh without raw GPS coordinate sharing (KURAL 23)
- 02
Hashed position commitment scheme: each node commits to a position without revealing it
- 03
Triangulation consistency check across registered mesh participants
- 04
SPOOF_INJECTION anomaly flag forwarded to the LSIA immunity engine for autonomous response
- 05
46-test green suite covering commitment scheme, mesh coordination, and anomaly cascade
How it works
Position Commitment
Each drone node submits a SHA-256 commitment to its current position. The raw latitude/longitude never enters the mesh coordinator or the database — only the commitment hash and a broad region prefix.
Triangulation Consistency
The mesh coordinator evaluates whether committed positions across multiple nodes are geometrically consistent given the known inter-node flight plan. Implausible claims — positions that cannot be simultaneously true given the flight geometry — are flagged as potential spoofing.
Anomaly Escalation
A SPOOF_INJECTION anomaly flag is generated and forwarded to the LSIA immunity engine, which can escalate to DEGRADED or SAFE_MODE and trigger autonomous defensive posture. Raw GPS coordinates are not included in the escalation record.
Standards we follow
- STD-01
NIST FIPS 180-4 — Secure Hash Standard (position commitment SHA-256)
- STD-02
ICAO Annex 10 — Aeronautical Telecommunications (GNSS integrity reference)
Areas served
This capability is deployed across 14 operational regions. Regulatory alignment details vary by jurisdiction — consult engineering for jurisdiction-specific deployment guidance.
Frequently asked questions
Why does the mesh use hashed commitments rather than sharing actual positions?
Raw GPS coordinates are personal location data under GDPR and operational security data under national airspace regulations. Sharing raw positions across nodes — even within the same fleet — would violate KURAL 23 (no raw location data in federation). The hashed commitment scheme allows triangulation consistency verification without any node ever seeing another node's actual coordinates.
Talk to engineering
For capability evaluation, integration guidance, and deployment scoping, submit a brief to the engineering team.
Submit engineering brief