Someone might not even want people to know that the conversation is even happening. But could something like an HD wallet fix this? Say I want to DM you. I send you a message from a new npub that only exists for the purpose of initiating a conversation with you. Part of the message is proof that I have the key that controls my public-facing Nostr account, and part of the message is another new npub that you can respond to if you choose. If you respond to my message to you, you send the message to that npub, from a new npub of your own with proof that you have the key that controls your public-facing npub. Now we are chatting using npubs that only you and I know about. The only thing anyone else can see is that you received a message from an unknown sender. No one knows who that message was from or even if you responded. I’m not a coder, but it seems like this could be done. Or am I way off?