HACKERS ..

CRACKERS (or BLACK HAT HACKERS): those who will enter your computer just for the fun of it, or to prove their technical skills, which are usually mid to high level.
BLUE HAT HACKERS:A blue hat hacker is someone outside computer security consulting firms that are used to bug test a system prior to its launch, looking for exploits so they can be closed.
The term has also been associated with a roughly annual security conference by Microsoft, the unofficial name coming from the blue color associated with Microsoft employee badges.
Gray Hat Hackers:A gray hat hacker is a hacker of ambiguous ethics and/or borderline legality, often frankly admitted (the color itself stands somewhere in between 'black' and 'white', the 'bad' and the 'good' guys).
WHITE HAT HACKERA white hat hacker (sometimes referred to as 'ethical hacker') is someone who breaks security but who does so for altruistic or at least non-malicious reasons.
The term is also used to describe hackers who work to deliberately design and code more secure systems.
SCRIPT KIDDIES: Script kiddie is a pejorative term for a computer intruder with little or no skill; a person who simply follows directions or uses a cook-book approach
-- typically using other people's scripts and shellcodes -- without fully understanding the meaning of the steps they are performing.