Smartphones and tablets have become an integral part of our daily lives. The capabilities of these handily sized mini-computers seem almost boundless as we phone friends, shoot holiday snaps, lose ourselves in a new music download or access the internet to obtain the boarding card for our next flight in comfort. Does it not seem logical, then, that we should make use of these constant companions as the key to our cars, front doors or lockers as well? A few such solutions are already available, but what’s still missing is widespread market acceptance. At this year’s CeBIT trade fair in Hannover (March 5-9, 2013), researchers from the Fraunhofer Institute for Secure Information Technology SIT in Darmstadt will be demonstrating their ShareKey software, a solution which will make the key app concept even more versatile and secure.