Zero-knowledge proofs and the pub test

Zero-knowledge proofs are a rare and beautiful thing: deeply technical, yet profoundly human. They offer a way to engage with digital systems without handing over your soul. Like a well-trained butler, they keep your secrets while getting things done. In an age where over-sharing has become the default, they offer something radical: the power to prove yourself, without losing yourself. The pub test: The colour-blind friend experiment Picture the scene: you are at the pub with your colour-blind friend Nicole. On the table are two pool balls – one brilliant blue, the other an unapologetically yellow sunshine hue. To Nicole, they look exactly the same. She thinks you are pulling her leg. Telling her to “just trust you” will not help, and simply pointing out which is which feels like cheating. ...

July 15, 2025 · 4 min