Overview | December 2021 
 3 • On a Mac, go to System Preferences > Apple ID > iCloud > Private Relay.
 
 
 
 
 Once it is enabled, users can choose how the...

https://www.apple.com/jp/privacy/docs/iCloud_Private_Relay_Overview_Dec2021.PDF

or Touch ID to sign in automatically. Users can sign in to a new app without filling out any forms or sharing any personal information at all. Just a unique...

https://www.apple.com/jp/privacy/docs/Sign_in_with_Apple_White_Paper_Nov_2019.pdf