Sign of Life

Prove you're human. Stay anonymous.

A trusted professional vouches that you are a real, verified person. The cryptography makes sure nobody, including the professional and including us, can ever tell which person you are.

How it works

1. 1

   Your phone makes a sealed request

   The Sign of Life app creates a secret only you hold and seals it inside a QR code.

2. 2

   A professional checks your ID in person

   A notary, doctor or your clinic confirms who you are, as they already do every day.

3. 3

   They sign without seeing

   Their app signs your sealed request blind. They never learn what they signed.

4. 4

   You prove you're real, anywhere

   Each site sees a different anonymous ID. Nobody, including us, can link it back to you.

Nothing to leak

We never store who you are. There is no list linking people to what they post, so even if we were hacked, there would be nobody to reveal. Every issuer's public key is published so anyone can check a badge.