A hacker is an individual who uses computer, networking or other skills to overcome a technical problem. The term hacker may refer to anyone with technical skills, but it often refers to a person who uses his or her abilities to gain unauthorized access to systems or networks in order to commit crimes.
A hacker may, for example, steal information to hurt people via identity theft, damage or bring down systems and, often, hold those systems hostage to collect ransom.
Types of hackers:-
The security community has informally used references to hat color as a way different types of hacker are identified, usually divided into three types: white hat, black hat and gray hat.
- White hat hackers, also known as ethical hackers, strive to operate in the public's best interest, rather than to create turmoil. Many white hat hackers work doing penetration testing, hired to attempt to break into the company's networks to find and report on security vulnerabilities.
- Black hat hackers intentionally gain unauthorized access to networks and systems with malicious intent, whether to steal data, spread malware or profit from ransomware, vandalize or otherwise damage systems or for any other reason -- including gaining notoriety
- Gray hat hackers fall somewhere between white hat hackers and black hat hackers. While their motives may be similar to those of white hat hackers, gray hats are more likely than white hat hackers to access systems without authorization; at the same time, they are more likely than black hat hackers to avoid doing unnecessary damage to the systems they hack.
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