You can generate short-lived and single-use credentials for users.

Without TURN, two clients that want to do streaming communication connect directly to each other, letting both ends know things like IP addresses, supported protocols, and other fingerprintable features. This was the norm for a long time - “I got your IP, I know where you live”

The U.S. Naval Research Lab (NRL) has been deploying this tech - free space optics (FSO) - for about a decade.

https://www.doncio.navy.mil/chips/ArticleDetails.aspx?ID=555...