iCloud Private Relay Overview 
 iCloud Private Relay Overview Learn how Private Relay protects 
 users’ privacy on the internet. December 2021 
 Introductio...

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

as local differential privacy to do something really exciting: gain insight into what many Apple users are doing, while helping to preserve the privacy of i...

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