A device includes two cameras, a front facing camera and a back facing camera. In response to a request to use one camera (e.g., the back facing camera) with particular functionality of an application, the application queries a system to verify whether the user is authenticated and authorized to use the camera with the particular functionality of the application. This authentication and authorization is performed based on an image of the user captured using another camera of the device (e.g., the front facing camera). Depending on whether the user is authenticated and authorized to use the camera with the particular functionality of the application, the particular functionality is performed using the camera, secondary (e.g., lesser) functionality is performed using the camera, or no functionality is performed using the camera.