The concept of a hacker is an interesting one. Generally, this term has been and is used to describe people who have extensive technical knowledge in a particular field and use this knowledge to solve specific problems in a very creative/innovative way. These days, the term "hacker" is associated with someone who breaks into IT systems and causes problems. Cybercrime and cyberterrorism are terms more commonly associated with "hacker" than "creativity" and "innovation".
Differentiation in IT Security
Within IT security, there are many different types of "hackers". The most relevant ones are the Black Hat Hacker, the White Hat Hacker, and the Grey Hat Hacker. In the context of legal hacking, the term Ethical Hacking/Ethical Hacker is very common. All relevant information about each hacker type can be found in the respective glossary entries.
Good Hackers, Bad Hackers
Very generally speaking, one can say: There are good hackers, these people help companies keep their infrastructure secure - for free, as a hobby, or professionally. The opposite are the bad hackers. Individuals or groups who attack IT systems to gain some kind of advantage - political, financial, or simply to cause damage.
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