Reality proofs · Challenges
Send a wallet a request for a signed photo or video. The capture happens live, in our camera, bound to the prover's identity — verifiable months later, offline, by anyone with their public key.
Examples
Use before meeting someone from a dating app, marketplace, or DM. The video is captured live in the Prson camera and signed on their phone, with device attestation and motion recorded — far harder to fake than a selfie or a video call, though not impossible.
Buying a used car remotely? Send the challenge before you wire a deposit. The seller can't pull the footage off a listing site — it has to be filmed by them, on their phone, right now.
Rental scams collapse quickly when the "landlord" is asked for a signed walkthrough video. Either you get a real apartment, or you save the deposit.
Marketplace listings, freelancer hardware claims, insurance checks — anything you'd want to confirm "this specific item, in your hands, right now" works as a challenge.
Booking a contractor or repairman online? Ask for a quick signed walk-through of the shop floor. Filters out drop-shippers and "I'll subcontract this" middlemen.
Quick way to confirm where someone actually is when GPS spoofing is plausible — used by journalists verifying sources and by safety-conscious first meet-ups.
Anatomy
When you accept a challenge, the challenger's prompt is included in the signature payload before the camera opens. You can't pre-record a generic walkthrough and reuse it.
No gallery picker, no upload-from-files, no screen recording. The challenge opens the camera directly and records straight to a hash on device.
The capture bytes are hashed with SHA-256 and signed by the prover's identity key — the same key that proved them human in the first place. The signature never leaves their phone.
The raw file is encrypted at rest. What's archived long-term is the hash plus the signature, so anyone with the prover's public key can re-verify the file months later — even if our servers go away.
Why it works
There's no path that accepts an existing file. The Prson camera is the only producer of valid proof captures.
The challenger's exact prompt is part of the signature payload. A proof for "show the VIN" can't be replayed as "show the odometer."
Each capture is signed by the prover's identity key. A proof from one wallet can't be re-presented by another.
With the prover's public key and the original file, anyone can verify authenticity locally — no Prson server involved.
Coming soon
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