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What is a hacker

A hacker is an individual or group of people who use a computer or network to gain unauthorised access to a computer system. A hacker may do this to steal information, hold the system ransom or even bring the system down. 

Password cracking is using an application to find an unknown password. This can be done by brute force or by recovering data stored in a computer system.  

Software cracking is when someone modifies a piece of software to disable or remove one or more of its features. This is typically done to remove copy protection, serial numbers and hardware keys.  

Ethical hacking is the process of finding vulnerabilities in a computer system or network with permission. Companies often pay yearly to have their systems tested.  

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