sophisticated attacks targeting iOS users, thereby expanding the set of weaponized exploits and attacks – often referred to as a “threat model” – that all u...

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

Ad measurement that respects user privacy 5 ........................................................ Minimizing data sharing with the Smart Search field 6。

https://www.apple.com/jp/safari/docs/Safari_White_Paper_Nov_2019.pdf