A private dating experiment built with real cryptography, using MPC and ZK proofs.
Co-Match is a privacy-preserving dating prototype with:
🔐 End-to-end encrypted preferences
🤝 Match discovery via secure MPC (thanks to co-snarks)
✅ Mutual match proof with ZK-SNARKs (thanks to Noir)
🙈 No swiping. No profile. No public data.
Built during #NoirHack as a fun experiment to combine MPC and ZK.
Live Demo (might be slow — ping me if it is!): https://co-match.vercel.app/
You enter your preferences and your Twitter handle, so your matches can contact you 🌶️.
Since I have your Twitter, it's not completely private... 😏 Next step: build an in-app chat.
Preferences are encrypted in your browser.
Ok, I'm lying here... 🙊 co-noir cannot yet run in the browser (not possible to compile to wasm), so I'm actually encrypting your preferences on the server. But this will soon be changed!
They're sent to multiple MPC servers that check for mutual matches.
Third time you caught me lying... I didn't want to pay for 3 servers for this PoC, so I'm actually running everything on 1 server, but it's spinning 3 local listeners, so it's kind of the same... 😂
If a match is found: A ZK proof is generated (with Noir) that confirms the match without revealing your preferences.
If there's no match: no one ever knows.
The Noir circuit is really simple, in order to make proving faster. Compiled with nargo 1.0.0-beta.3, it has 188 gates.
You'll need a powerful server to compute the proofs fast. I'm renting an Hetzner's CCX33 (8 vcpus, 32GB) and each proof takes about 450ms to generate.
Run the config.sh file to generate the certificates and keys for each server.
You'll need to add an env variable for the JWT token: JWT_SECRET
Tip
If you want to run the server but you're struggling to set it up, message me on Twitter and i'll help you
Edit the config with the address of the API