Last week, we learned that the FBI accessed a defendant’s deleted Signal messages on their iPhone, even though that user had deleted the app entirely from their device. It wasn’t that the FBI was able to find the messages themselves on the device; rather, it turns out they were able to pull incoming Signal texts from the defendant’s push notification database. If you’re like most people, you probably had no idea devices like the iPhone had such a push notification database, and that it could be used to retrieve deleted messages. Luckily, there’s an easy way to protect yourself, and ensure no one can pull sensitive information from this space on your iPhone, or any device that receive sensitive notifications.
It is unclear how the push notifications database works, or whether clearing notifications deletes their info from the database. But we might be able to glean some insight from a blog
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