Researchers Alasdair Allan and Pete Warden indicate that the iPad and iPhone have been storing locations and time stamps. This geographic data has been recorded ever since the iOS 4 update.

“We’re not sure why Apple is gathering this data, but it’s clearly intentional, as the database is being restored across backups, and even device migrations,” the pair wrote. “The presence of this data on your iPhone, your iPad, and your backups has security and privacy implications. We’ve contacted Apple’s Product Security team, but we haven’t heard back.”

Source: O’Reilly Radar Blog