In the last decade the unmanned aircraft industry has experienced an exponential growth in both the military and civil sectors. Originally developed for military purposes, Unmanned Aerial Vehicles (UAVs) are nowadays employed in a wide variety of fields, ranging from delivery services to photography, from agriculture to law enforcement. The commercial availability of UAVs, which can be easily purchased from the Internet at a cost of few hundreds of dollars, has raised new and relevant threats to security and privacy, since this technology can be potentially exploited by malicious parties to carry out illegal acts, such as terrorist attacks or privacy violations.