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Hacking generally refers to unauthorized intrusion into a computer or a network. The person engaged in hacking activities is known as a hacker. This hacker may alter system or security features to accomplish a goal that differs from the original purpose of the system.
Hacking can also refer to non-malicious activities, usually involving unusual or improvised alterations to equipment or processes.
Hackers employ a variety of techniques for hacking, including:
Certain corporations employ hackers as part of their support staff. These legitimate hackers use their skills to find flaws in the company security system, thus preventing identity theft and other computer-related crimes.