I'm building the ‘Apple Pay’ of verified truth — except you’re not paying, you’re proving something.
ZKTap is a privacy-preserving, real-world identity verification system that lets users tap their phone to a reader and prove a fact about themselves - like being over 18, a student, or a verified member - without revealing any personal information.
It leverages zk-SNARKs and NFC technology to compress verifiable claims into a single tap, enabling anonymous, trustless, instant verification in physical environments like events, stadiums, campuses, and local businesses.
Today, proving identity in the real world is messy - you show your government ID to a bad actor a bar and then you've leaked your name, address, birth date and other personal information.
Alternatively, you can try connecting this information with your wallet address and reveal your entire on-chain history...
There is currently no way to prove these claims privately and instantly in offline or semi-offline environments.
This is where ZKTap comes in, the first to bring Zero-Knowledge Proofs to NFC and mobile phones.
ZKTap lets users generate a zk-SNARK proof (via VLayer) showing that they've met a specific condition (e.g. NFT ownership) without revealing their wallet, identity or data.
The proof is around ~750 bytes, stored locally on the phone, and served via Android NFC Host Card Emulation (HCE). When tapped against a reader (e.g., another phone), the proof is sent via APDU command, and verified.
No tracking. Just cryptographic truth — on tap.
📲 Mobile App (Prover)
📡 Reader App (Verifier)
Shows ✅ if valid, ❌ if not
🔐 The Proof Uses a circuit proving the user holds an 18+ age-verified NFT
zk-SNARK ensures:
📊 API
🖥️ Web Frontend
🐵 Verified NFT