At this year’s PasswordsCon, viaForensics Mobile Researcher David Weinsten presented”Stronger Identity Protection via Mobile Devices”. The presentation was made on July 30, 2013.
Without knowledge of what is possible, it is very difficult to propose solutions that have real impact. Therefore, we must also take into account that attackers will not use more sophisticated techniques than are necessary to win.
With access to the microphone, GPS/network location, camera, and an accelerometer, having control of a mobile device in a corporate setting is a dream for an attacker.