Comment by numtel

4 years ago

Messages are signed by cryptographic signatures so nobody can claim to be you.

This is how JWTs and many other protocols ensure message authenticity.

> nobody can claim to be you.

Nobody can claim to have your private key, but they can sure as hell claim to be you.

We won't know who the real numtel ever is without some real-world proof and verification. This is where a lot of this crypto-based stuff starts to crumble: sure the mathematics of the cryptography works well on chain, but there is a very limited set of things that exist 100% purely on the blockchain - as soon as you need to go off of the blockchain for anything (e.g. proving human identity, proving ownership of a physical asset like a house etc) then you're back to the same old problems we've always had of having to prove identity/ownership/whatever, and you cant use a cryptographic hash to prove that I own the apple I am eating right now ... perhaps you can prove that I own an apple, but can you prove I own this apple?

Nobody can claim they own the key you claim you owned, but, unless you have a person-to-key map somewhere, my claim I'm you is as good as yours.