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FBI Extracts Suspect’s Deleted Signal Messages Saved in iPhone Notification Database
(www.404media.co)
This is a most excellent place for technology news and articles.
By not having Google Play Services, isn't this prevented?
If you don't use Google Play Services, you don't get push notifications, so yes. Libre reimplementations of Google Play Services such as Gapps etc. or alternative push notification providers do not circumvent this issue, except possibly self-hosted push notification providers. This approach is really rare though and limited generally to very few apps.
This is about a history of notifications locally on the phone.
This is implemented outside of gms at least on my rom, and in the past I have also installed a separate app to do the same.
If you log your notifications ... that log can leak your notifications.
Yes, I know! Sorry for the confusion, I just wanted to take the opportunity to raise awareness about a privacy issue that lots of people aren't aware of