Hackers are generally computer geniuses because it is due to the extraordinary computer knowledge and skills that they can conveniently break into other computer systems. They are also known as crackers. In fact, many brilliant aspects and functioning of computers are invented by the hackers. Hackers need to be very cautious in what they are doing and how. They pre plan their mode of action before starting with a new venture. Hence, hacking, in spite of its being an unwanted and illegal crime involves lots of prediction and intelligence.