Use Case
Emergency Check-In
Prove you're safe — without revealing where you are.
The Problem
Emergency Check-In
In disasters, people need to signal safety without exposing their exact location to bad actors. Traditional check-in apps leak sensitive data. Families wait anxiously without a way to verify a loved one is safe.
The Solution
7aychain
7aychain lets anyone prove they are at a safe zone (shelter, rally point, hospital) with zero-knowledge proofs. Loved ones see a verified 'safe' signal. No ID, no coordinates leaked — just a cryptographic confirmation of safety.
Key Features
1
Zero-knowledge safety signals
2
Works at any designated safe zone
3
No personal data ever exposed
4
Deployable by NGOs and first responders
Build on Proof of Presence
The devnet is live. Start shipping bot-proof applications today.