Toward Practical Decentralized Proof-of-Location via Physical Witnessing Zones
Building a system that proves you were actually there, not just claiming it
Researchers built a working prototype that uses nearby devices to verify when someone is physically present in a specific location—creating tamper-proof records that can't be faked or altered later. The system detected attempts to spoof location claims and operated reliably indoors, offering a practical foundation for location verification without relying on a single authority.
Today's location claims for deliveries, security checkpoints, and asset tracking are often based on self-reported data that's easy to fake and impossible to verify after the fact. A decentralized proof-of-location system would make it much harder to lie about where something or someone was, which matters for supply chains, insurance claims, and access control—anywhere that proving actual physical presence later becomes important.