provides express permission to Afilias to permit DNSSEC for child zones in the .Apple TLD. Only registrars (on behalf of their registrants) are permitted to...

https://www.apple.com/jp/legal/intellectual-property/tld/dps/

Developers can call a local refresh API (getCredentialsState) to confirm that the user is still securely signed in to iCloud on the device and allow the use...

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