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A hacker utilizes alternative system access methods to sabotage computer systems and networks.
Hacking actions are differentiated as illegal and unacceptable (black/grey hat hacking), or legal and acceptable (white hat hacking).
Hacker is a term that refers to many different computing topics. However, in the mainstream, a hacker is any individual or group that circumvents security to access unauthorized data.
Most hackers are highly skilled computer programmers that locate security gaps and access secure systems via unique analytical skills. A great hacker is known to be able to "think outside the box."
Hacker types are delineated according to intent, as follows: