XPrivacy can prevent applications from leaking privacy-sensitive data by restricting the categories of data an application can access. XPrivacy feeds applications fake data or no data at all. It can restrict several data categories, such as contacts or location. For example, if you restrict an application's access to contacts, that application will receive an empty contacts list (don't try this with the contacts application itself without a backup). Similarly, restricting an application's access to your location will send a fake location to that application.