Wittgenstein's ladder for a next-level darknet?

[professor rat]

The essence of zero-knowledge proofs is that, while it is trivial to prove that one possesses knowledge of certain information by simply revealing it; the challenge is to prove such possession without revealing the information itself or any additional information

How do you access the contents of a safe without ever opening its lock or otherwise getting inside? 
This riddle may seem confounding, but its digital equivalent is now so solvable that it’s becoming a business plan. IBM is the latest innovator to tackle the well-studied cryptographic technique called fully homomorphic encryption (FHE), which allows for the processing of encrypted files without ever needing to decrypt them first.

https://thenewinquiry.com/blog/zero-knowledge-proofs/

Reposts etc