I'm not too familiar with 4chan and handshake, but my current understanding of this is that it's like using public-private key cryptography for creating user id

I'm not too familiar with 4chan and handshake, but my current understanding of this is that it's like using public-private key cryptography for creating user identities, and then using blockchain to map public keys to usernames? So if I wanted to make a post, I first generate a public-private key pair, and then sign posts using my public key?