[Cyphase]

> 50+ characters that can be A-Z0-9 feels like an insane amount of entropy for something that's essentially a proxy for a 12 digit number.

That's not all it is. It's your cryptographic public key.

> Additionally, I don't necessarily want a key sitting out there that will let any random person who finds it a dynamic way to look up my current IP address.

Sure, that makes sense. How else would you propose that it work?

Just to mention, you can use a private, self-hosted discovery server.