Post-mission assurance for modern defence systems

Trusted mission logs for drones and space systems in contested environments

4SGN is a software solution that detects tampering and anomalies in mission logs from drones and space assets and provides cryptographically verifiable proof of data integrity for post-mission analysis, coalition data sharing, and legal accountability.

Designed for operations where GNSS is degraded, communications are contested, and trust in mission data cannot be assumed.

Resilient PNT Data Integrity Sovereign Defence Infrastructure Coalition Verification
Fits into Post-mission assurance layer complementing ISR (Intelligence, Surveillance, Reconnaissance) platforms, counter-UAS (Unmanned Aircraft System) systems, space situational awareness and sovereign defence clouds.
What it avoids No dependency on sensors, operating systems internals, or hardware roots of trust. No changes to flight control systems.
Outcome Cryptographically verifiable, tamper-evident mission evidence ensuring the integrity and temporal consistency of mission logs and telemetry. Supports independent post-mission assessment, compliance with European defence and space governance requirements, and preserves evidentiary value for accountability and investigations.

The problem

Why mission logs need a trust layer

Logs cannot be assumed authentic

In contested environments, mission logs and telemetry can be degraded, inconsistent, truncated, replayed, or manipulated.

  • GNSS disruption and spoofing cascades into downstream mission data
  • Centralised storage enables undetected modification
  • Disputes undermine operational trust and legal defensibility

What’s at stake

Without verifiable integrity, post-mission analysis becomes uncertain, coalition sharing is harder, and accountability weakens.

  • Slower investigations and higher dispute costs
  • Lower confidence in ISR outputs under contested PNT
  • Reduced evidentiary value for legal processes

Benefits and value proposition

Clear impact with low integration risk

Benefits

  • Cryptographically provable integrity
  • Reduced investigation time and disputes
  • Improved coalition trust
  • Legal robustness of mission evidence

Value proposition

  • For defence organisations: trust mission outcomes, reduce authenticity disputes, strengthen accountability
  • For commanders, analysts: identify manipulated segments quickly and act on verified evidence
  • For coalitions, partners: share data with verifiable guarantees and avoid single-party “ground truth” control

Unique advantage

Detection + proof, not just logging. 4SGN works post-mission or near-real-time without touching flight control systems, does not depend on sensors or OS internals, and is built for multi-organisation verification.

How it works

Two tightly coupled layers

1) Tamper & anomaly detection (core)

  • Analyses mission logs, telemetry streams, and event records
  • Detects partial truncation, replay/reordering, time inconsistencies
  • Flags physically implausible transitions linked to spoofing or interference
  • Produces forensic explanations and confidence scores

2) Cryptographic assurance (trust layer)

  • Generates rolling hash chains and Merkle roots
  • Anchors integrity fingerprints in a permissioned, sovereign blockchain
  • Ensures any post-mission modification is provably detectable
  • Operational data stays off-chain, only minimal cryptographic proofs are anchored

Supporting European defence priorities

Explicit fit to Resilient PNT & Data Integrity

Resilient PNT

  • Validates mission data after GNSS (Global Navigation Satellite System) disruption or spoofing
  • Detects downstream effects of navigation degradation in logs and telemetry
  • Preserves confidence in ISR outputs even when PNT (Positioning, Navigation, and Timing) is contested

Data Integrity and Sovereign Defence Infrastructure

  • Tamper-evident mission records without reliance on non-EU cloud providers
  • Supports coalition operations, joint missions, and cross-border data sharing
  • Aligns with EU principles of sovereignty, accountability, and lawful use of force

Legal accountability and investigations

  • Preserves chain of custody for mission data
  • Enables independent verification for incident investigations, damage assessment, compliance reviews
  • Supports potential war crimes investigations through tamper-evident evidence preservation

Next step

Pilot-ready, low-friction deployment

Request a pilot deployment

4SGN is designed for fast integration into existing post-mission workflows. Share a sample log format and we will demonstrate tamper detection, anomaly scoring, and integrity proof verification on your data.

Works with existing logs Offline-first verification Minimal footprint on sovereign ledger