FWIW, I built an additional handshake protocol called #nauth that handles relay negotiations for authentication and transmittal of records. I recently upgrade the handshake to handle the negotiation of quantum-safe keys. Much like IP #nostr is the starting point. I am grafting on top my equivalent of TCP. For my project, it is working super-well - I transmit ecash payments and do records transfers - all in the background, invisible to the user, but more importantly, invisible to the TLS/CA/DNS infrastructure.