What he's talking about is E2E encryption with a public access blockchain whereupon you, the user, would be able to retrieve essentially public available data. Only diff between you and some rando is that you and you alone have a key kept offline.

You want to ping a server? Add to the bIockchain. Server should be able to access that with their own key without knowing the sender, since it's all there. Just need to know what and where.

There's probably a more efficient way to do this. Just saying.