Code : github

A privacy-preserving proof-of-personhood prototype. The idea: prove you are a real, unique human linked to your wallet — without your face ever leaving your device and without biometric data being stored anywhere.

How it works

• MediaPipe extracts facial landmarks locally in the browser
• BCH error-correcting codes turn those landmarks into a stable, recoverable secret
• A Groth16 zk-SNARK proves possession of that secret on-chain — the face data itself is never revealed
• Cross-device recovery works via on-chain helper data
• A Rust relayer abstracts gas so end users don’t need ETH to register

Tech Stack used

• Frontend — React + ethers.js
• Backend — Rust (Axum)
• Smart Contracts — Solidity + Foundry
• ZK Layer — Circom circuits compiled to WASM, snarkjs for in-browser proof generation (BN128 curve)