In common usage, a hacker is a stereotypical person who breaks into computers and computer networks, either for profit or motivated by the challenge.[1] The subculture that has evolved around hackers is often referred to as the computer underground but is now an open community.[2]
Other definitions of the word hacker exist that are not related to computer security. They are subject to the long standing hacker definition controversy about the true meaning of hacker. In this controversy, the term hacker is reclaimed by computer programmers who argue that someone breaking into computers is better called cracker,[3] 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. None of this controversy has gained any relevance in mainstream media, TV and movies, however.
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