Apple investigating new question-based iPhone unlock, hearing aid auto-detection

The first filing published by the U.S. Patent and Trademark Office this week reveals a new unlock method that could offer personalized security. The system would require a user to accurately identify one or more objects depicted in an image.

A user could have a series of custom images selected for the unlock system, and an iPhone would randomly select one of those pictures to display when a user wishes to use the device. The user would also provide authentication data associated with the image to ensure security.