There are several categories of hackers: 1. White hat hackers test security systems for vulnerabilities and are considered "ethical hackers". 2. Black hat hackers violate security illegally and maliciously for personal gain or to damage systems. 3. Grey hat hackers fall between white and black hats, sometimes accessing systems without permission but not causing damage. 4. Other categories include blue hat hackers who test systems for companies, elite hackers with advanced skills, and script kiddies with limited hacking knowledge who rely on pre-made tools.

1. classification of hackers as per their work
We can divide hackers in mainly e parts that is .....
1. White Hat Hackers
2. Grey Hat Hackers
3. Black Hat hackers
Apart from these three an special name is also their i.e.
* Blue Hat hackers
white hate hackers are those hackers who has total authorization to hack in a system/network/server
they helps in finding the loop holes in the security of a system/network/server.They are generally
called ethical hackers or penetration testers.They are good guys.They have good ethics.
Black hat hackers are those hackers who doesn't have any authorization to hack but they do it.They are
also called crackers.they make changes in the look and also in the databases of web sites as well as
some time they delete it for fun only.They are called bad guys.They don't have any ethics.
Gery hat hackers comes in between white and black they also not have authorization to by pass the
security mechanism of a system/server/network but they do it.Good thing is that they also doesn't
make any kind of changes in the database even though they help to secure the system.They are
independent testers.
Blue hack is nothing different.Microsoft given a name to their own hackers who helps to secure the
network of Microsoft.They are also smiler to Grey hat hackers.
Posted by hakindia007 at 2:12 PM
Hacking means finding out weaknesses in an established system and exploiting them. A computer
hacker is a person who finds out weaknesses in the computer and exploits it. Hackers may be motivated
[1]
by a multitude of reasons, such as profit, protest, or challenge. The subculture that has evolved around
[2]
hackers is often referred to as the computer underground but it is now an open community. While other
uses of the word hacker exist that are not related to computer security, they are rarely used in
mainstream context. They are subject to the long standing hacker definition controversy about the true
meaning of the term hacker. In this controversy, the term hacker is reclaimed by computer
[3]
programmers who argue that someone breaking into computers is better called a cracker, not making a
difference between computer criminals (black hats) and computer security experts (white hats). Some
white hat hackers claim that they also deserve the title hacker, and that only black hats should be called
crackers.

2. Several subgroups of the computer underground with different attitudes and aims use different terms to
demarcate themselves from each other, or try to exclude some specific group with which they do not
agree. Eric S. Raymond (author of The New Hacker's Dictionary) advocates that members of the
computer underground should be called crackers. Yet, those people see themselves as hackers and even
try to include the views of Raymond in what they see as one wider hacker culture, a view harshly rejected
by Raymond himself. Instead of a hacker/cracker dichotomy, they give more emphasis to a spectrum of
different categories, such as white hat, grey hat, black hat and script kiddie. In contrast to Raymond, they
usually reserve the term cracker. According to (Clifford R.D. 2006) a cracker or cracking is to "gain
unauthorized access to a computer in order to commit another crime such as destroying information
[4] [5]
contained in that system". These subgroups may also be defined by the legal status of their activities.
White hat
A white hat hacker breaks security for non-malicious reasons, for instance testing their own
security system.The term "white hat" in Internet slang refers to an ethical hacker. This
classification also includes individuals who perform penetration tests and vulnerability
assessments within a contractual agreement. Often, this type of 'white hat' hacker is called an
ethical hacker. The International Council of Electronic Commerce Consultants, also known as
the EC-Council has developed certifications, courseware, classes, and online training covering
[5]
the diverse arena of Ethical Hacking.
Black hat
A Black Hat Hacker is a hacker who "violates computer security for little reason beyond
[6]
maliciousness or for personal gain"(Moore,2005). Black Hat Hackers are "the epitome of all that
[7]
the public fears in a computer criminal". Black Hat Hackers break into secure networks to
destroy data or make the network unusable for those who are authorized to use the network. The
way Black Hat Hackers choose the networks that they are going to break into is by a process that
can be broken down into two parts. This is called the pre-hacking stage.
Part 1 Targeting
Targeting is when the hacker determines what network to break into. The target may be of
particular interest to the hacker, or the hacker may "Port Scan" a network to determine if it is
vulnerable to attacks. A port is defined as "an opening through which the computer receives data
[6]
via the network". Open ports will allow a hacker to access the system.
Part 2 Research and Information Gathering
It is in this stage that the hacker will visit or contact the target in some way in hopes of finding out
vital information that will help them access the system. The main way that hackers get desired
results from this stage is from Social Engineering, which will be explained below. Aside from
Social Engineering hackers can also use a technique called Dumpster Diving. Dumpster Diving is
when a hacker will literally dive into a dumpster in hopes to find documents that users have

3. thrown away, which may contain information a hacker can use directly or indirectly, to help them
gain access to a network.
Grey hat
A grey hat hacker is a combination of a Black Hat and a White Hat Hacker. A Grey Hat Hacker
may surf the internet and hack into a computer system for the sole purpose of notifying the
administrator that their system has been hacked, for example. Then they may offer to repair their
[7]
system for a small fee.
Elite hacker
A social status among hackers, elite is used to describe the most skilled. Newly
discovered exploits will circulate among these hackers. Elite groups such as Masters of
[8]
Deception conferred a kind of credibility on their members.
Script kiddie
A script kiddie (or skiddie) is a non-expert who breaks into computer systems by using pre-
packaged automated tools written by others, usually with little understanding of the underlying
concept—hence the term script (i.e. a prearranged plan or set of activities) kiddie (i.e. kid, child—
[9]
an individual lacking knowledge and experience, immature).
Neophyte
A neophyte, "n00b", or "newbie" is someone who is new to hacking or phreaking and has almost
[7]
no knowledge or experience of the workings of technology, and hacking.
Blue hat
A blue hat hacker is someone outside computer security consulting firms who is used to bug test
a system prior to its launch, looking for exploits so they can be closed. Microsoft also uses the
[10][11][12]
term BlueHat to represent a series of security briefing events.
Hacktivist
A hacktivist is a hacker who utilizes technology to announce a social, ideological, religious, or
political message. In general, mosthacktivism involves website defacement or denial-of-service
attacks.