Multiple chat keys per account

Idea name: Multiple chat keys per account
Description: Allow deriving more keys to be used for chat
Use case: *As a user, I want to create multiple chat keys so that I can use one to connect my ENS name and select others chat keys to send messages when I want to remain more private
Why this is important: When I send messages using my ENS name, anyone can look up my wallet address as well as already identify me by my ENS name. Sometimes I don’t want this to be the case.