How a driverless car sees the world.

In the video they talk about the difference between driver assistance cars and self-driving cars, the time and coding that goes into making self-driving cars as safe as possible, and how the car reacts to random situations. They use infrared lasers and information from other cars to know how to respond. I believe that in my lifetime, the first self driving car will come out, but for now it still needs to work out the kinks and glitches.

1. What type of electronics and mechanics keep the car driving and help it know whats about to happen?

2. What will prevent hackers from hacking into the cars gps and driving you off a cliff?