The application of computers can be also seen in the cars that are being designed these days. Most of the cars that are being sold in the market at present a lot on the electronic systems and on-board computers. All the vehicles that are running in USA since 1996 must have an on-board computer in them. 
The hackers are now taking advantage of this fact. They are set the cars as their new target. The people who are carrying out various kinds of researches with hacking techniques have stated that hackers are able to break the security system of the car within just few minutes. Once they have done that they can easily alter the security system of the car. The on-board computers of the cars are so vulnerable to such attacks that the hackers can easily control the braking system of the car.
Changes in the control of the car when hacked
Once the car has been hacked its full control relies on the hands of the hacker. Let’s have a look at some of things that can be controlled.
The hackers can easily disengage the breaks once they are able to break into on-board computers. For instance you won’t be able to apply brakes to car if you are going slowly.
The headlights of the car also come under the control of the hackers. They can turn them on or off according to their will.
In some cases they are also able to honk the horn.
The car can be also parked with the help of the park assist feature that is found in most modern cars. All the hackers need is a few moment of physical access to the computer that is controlling the functioning of the car. Once they get the access they will be able to change the programs within a few seconds.
The experimenting team members Valasek and Charlie Miller will be presenting the whole report at Def Con.