White hat/black hat hackers: White hat hackers are hackers who perform hacking for legit- imate reasons, e.g. IT security technicians testing their systems and researchers testing the limits of systems. On the other hand, black hat hackers are those who perform clandestine hacking for malicious reasons; such persons can also be referred to as ‘crackers’. Grey hat hackers are those who seem to fall between both camps.
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