Mattia Dimauro:

Of course there were other informations lying there. You can easily grasp the daily usage of the service, the coverage of a certain area, the average distance covered in a shift and so on. With this bar chart, you can see that during the weekend there’s a clear predisposition to use the service. But I wanted to take a deeper look into this, especially to see if some privacy flaw could’ve been found.
 The easiest attack that I could think of, was a kind of virtual car chase. That is, you can follow a car remotely. Then, if you see somebody getting on one of these cars, you can just wait to see it reappearing on the map to discover where he was going. This is simple and can be done easily. Let’s see if we can push this further.