Zero-knowledge proofs are a (new) form of cryptography that allows you to proof certain things without disclosing any information (pretty sure someone can explain it better).

This link is a demo page that has some zero-knowledge proofs (zkSNAKS) programmed in WebAssembly which is a new and fast way to run code in a browser. It's not a test, just an interactive demo to show that it works.

Here's Wikipedia on ZKPs, to give people context. https://en.wikipedia.org/wiki/Zero-knowledge_proof It's unclear that this is yet possible to execute satisfactorily for internet use, and smart observers I've spoken to think it's at least a couple of years away, if not more. But here's a link from the wikipedia article suggesting something's up. https://cointelegraph.com/news/ethereum-upgrade-byzantium-is...