PHI-Chain: a blockchain ledger built to catch the lie a spoofed cockpit signal tells.

Modern aircraft communications protocols — ADS-B, ACARS, TCAS — were designed decades before anyone worried about a bad actor spoofing them. They authenticate format, not origin. A convincing fake signal can look identical to a real one to the receiving system.

PHI-Chain runs a permissioned Hyperledger Fabric network alongside existing avionics comms, cross-referencing incoming telemetry against a tamper-evident distributed ledger before it's trusted. The hard problem we solved is what we call the TCAS Paradox: TCAS needs sub-second response times that a full blockchain consensus round can't naturally deliver without risking the very collision-avoidance function it's meant to protect. Our Split-Payload Architecture separates the time-critical collision data from the slower-consensus integrity verification, so safety-of-flight timing is never compromised waiting on ledger confirmation.

We benchmarked latency across 2,300+ transaction batches to validate this holds under realistic load, not just in a clean lab run.

Full protocol architecture, threshold-cryptography scheme, and consensus configuration are reserved for OEM and institutional partners under NDA — this page covers what the system does, not how it's built.