Hacker is a person who breaks in, by gaining an unauthorized access to others computer without their permission. They steal personal data, can cahnge or destroy information, gaining fame, stealing mony and making network unavailable by installing dangerous malwares.
Hackers can be classified as black hat hacker, white hat hackers and grey hat hacker, by the task and intensions to use their skills.
Black Hat Hackers. They can gain unauthorized access to systemharm its operation and can steal sensitive information. They are also called crackers.
Grey Hat Hackers. Thry act without malicious intent but for their fun. Grey hat hackers are mixture of both white and black hat hackers.
White hat hackers. Their intent is to not harm a system, they try to find out vulnerabilities in a computer as a part of penetration testing. They are also known as Ethical Hackers.
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