Gwynbleide

Greetings, as non iOS user I just learned there is a cool feature in new iOS 11 where you can easily share wifi password with another iOS11 iPhone or High Sierra device. You can read about it here for example: https://www.cnet.com/how-to/how-to-easily-share-your-wifi-password-with-ios-11/ I could not find anywhere how this works technically. Anyone has a source? Thanks!