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IRLid lets two people prove they physically met — no app, no accounts, no biometrics required.
Two phones. Two QR scans. One cryptographically signed receipt proving co-location within 12 metres at a specific time. ECDSA P-256 via the Web Crypto API. Entirely browser-based.
v4: optional bio-metric confirmation (Face ID/fingerprint committed into the signed payload), privacy mode (GPS replaced with SHA-256 hash), trust history scoring.
Open source. Free. One developer, UK, spare time.
IRLid — Proof of PersonhoodProve you physically met someone — like reCAPTCHA but IRL
Spencer Austinleft a comment
Hi PH 👋 Solo dev from the UK here. IRLid started from a simple problem: there's no lightweight, privacy-respecting way to prove two people physically met. Every existing solution either requires an app, a central database, or biometrics you can't opt out of. IRLid is the opposite: two phones, two QR scans, one cryptographically signed receipt. ECDSA P-256 via Web Crypto API. No download, no...
IRLid — Proof of PersonhoodProve you physically met someone — like reCAPTCHA but IRL