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An ethical hacker (also known as a white hat) is somebody who understands the nature of exploiting vulnerable systems. Ethical hackers are testing for vulnerabilities in their own systems, whether for work or personal projects, or just for fun. Hackers break the system and apply or tell you how to apply fixes. Better the good guys than the bad guys taking over your system, right? An injection attack is a sophisticated tactic where a protagonist can inject their own programming on a target to gain access to a target.