Share You can only stay safe by disabling AirDrop discovery in the system settings of your Apple device, a study says Two security loopholes in Apple’s AirDrop feature could let hackers access the phone numbers and email addresses associated with both the sending and receiving device, German researchers have found. The feature, which lets users easily transfer files between Macs, iPhones and iPads, is present in more than 1.5 billion Apple devices. The two vulnerabilities are classified as severe and affect AirDrop’s authentication protocol, according to the paper called and written by a research team from the Technical University of Darmstadt, Germany.