ZK Proof Types

ZK Location Proof

Prover (Worker) proves:
"I was within R meters of location (lat, long) at time T"

Does not expose:
- Exact GPS coordinates
- Movement history
- Device information

Implementation: ZK-SNARKs on GPS data with geofence circuits

ZK Completion Proof

Prover (Worker) proves:
"I captured image I showing object O at location L"

Does not expose:
- Full original image
- PII in the image
- Precise metadata beyond requirements

Implementation: Image hash commitment + selective disclosure

ZK Identity Proof

Prover (Human) proves:
"I am a unique verified human with credential C"

Does not expose:
- Real name
- Face/biometrics
- Document details

Implementation: Semaphore-style nullifiers, or WorldID integration

ZK Reputation Proof

Prover (Participant) proves:
"My reputation score is above threshold T"

Does not expose:
- Exact score
- Score history
- Individual task ratings

Implementation: Range proof on committed score