Imagine your drone being hacked into and stolen while in mid flight. Your drone just starts to fly away from you. After you run to see where it has gone, your cannot find it. It has just disappeared.
Or just as bad, you lose control of your drone and it crashes. You blame your piloting skills or electric interference from a telephone mast. But the problem is, your drone has been hacked into.
Drones are very much like flying computers. They have operating systems, network connections and hardware which all have programmed code. So in many ways a drone is just as easy to hack into as a computer.
Someone that can hack into a computer can hack into a drone. They just have to make the connection to either your remote controller (cellphone, tablet, laptop) or to the drone by intercepting the signal. But there are ways you can secure your drone from hackers.