Introduction to Hacking

What is computer hacking?
Hacking is the process of taking advantage of weakness in a computer or computer network to accomplish his goal. The person who is engaging in hacking activities  called as 'Hacker'.  Hackers may be motivated by a multiple reasons, such as profit, protest, challenge or just for fun.
 

Types of Hackers:

White Hat Hacker:

White Hat hackers are good guys who does the hacking for defensing.  They probably work an organization for providing security.

Black Hat Hacker

Black hat hackers are bad guys(the malicious hackers or crackers).  They usually steal the other bank information and steal the money.
They use their skills for illegal purposes.
They are creators of viruses,malware,spyware.
They will destroy your pc.

Gray Hat Hackers

Grey hats are hackers who may work offensively or defensively, depending on the situation.
This is the dividing line between hacker and cracker. Both are powerful forces on the Internet,
and both will remain permanently. And some individuals qualify for both categories. The
existence of such individuals further clouds the division between these two groups of people.
In addition to these groups, there are self-proclaimed ethical hackers, who are interested in hacker tools mostly from a curiosity standpoint. They may want to highlight security problems
in a system or educate victims so they secure their systems properly. These hackers are
doing their “victims” a favor. For instance, if a weakness is discovered in a service offered by
an investment bank, the hacker is doing the bank a favor by giving the bank a chance to rectify
the vulnerability.

Script Kiddie

The term script kiddie has come into vogue in recent years. The term refers to
crackers who use scripts and programs written by others to perform their intrusions.
If one is labeled a “script kiddie,” then he or she is assumed to be incapable
of producing his or her own tools and exploits, and lacks proper
understanding of exactly how the tools he or she uses work. As will be apparent
by the end of this chapter, skill and knowledge (and secondarily, ethics) are the
essential ingredients to achieving status in the minds of hackers. By definition,
a script kiddie has no skills, no knowledge, and no ethics.

Phreak

A phreak is a hacker variant, or rather, a specific species of hacker. Phreak is
short for phone phreak (freak spelled with a ph, like phone is). Phreaks are
hackers with an interest in telephones and telephone systems. Naturally, there
has been at times a tremendous amount of overlap between traditional hacker
roles and phreaks.