Data transmitted to Google and Apple includes metadata “Detailing which app received a notification and when, as well as the phone and associated Apple or Google account to which that notification was intended to be delivered,” Wyden wrote. “As with all of the other information these companies store for or about their users, because Apple and Google deliver push notification data, they can be secretly compelled by governments to hand over this information,” Wyden wrote. A Google spokesperson told Ars that Google was “The first major company to publish a public transparency report sharing the number and types of government requests for user data we receive, including the requests referred to by Senator Wyden.” That means Google’s transparency report, Ars confirmed, already documents requests for push notification data in aggregated data of all government requests for user information.

Source: Apple admits to secretly giving governments push notification data