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https://www.theregister.com/2024/02/29/push_notification_privacy/
"More than 130 petitions seeking access to push notification metadata have been filed in US courts, according to a Washington Post investigation – a finding that underscores the lack of privacy protection available to users of mobile devices."
"App developers can encrypt these messages when they're stored (in transit they're protected by TLS) but the associated metadata – the app receiving the notification, the time stamp, and network details – is not encrypted."
