Data transmission over radio channels is reliable and commonly used method to communicate. Many means of public transportation relay on it but if you dig into its security there is a lot of things we would like to see improved. Radio communication is running over very special physical layer that means that everyone can listen to it and almost in every case everyone can interfere with it. Luckily there are only few geeks that know how to play with it! Airplanes communication with control towers is not encrypted, trains communicate on selected channels but traffic is not encrypted as well. There are already known cases when some kids decided to change tracks, several catastrophes have already happened… Come and see what nowadays radio communication is about!