Which of the following classes of hackers describes an individual who uses his computer knowledge for breaking security laws, invading privacy, and making information systems insecure?

White Hat hackers are ethical security professionals who perform authorized penetration testing and vulnerability assessments to help organizations improve their defenses.

Black Hat hackers deliberately use their knowledge for illegal and unethical purposes - including unauthorized system access, privacy invasion, and deliberately making systems insecure - distinguishing them from White Hat hackers who operate with authorization and Gray Hat hackers who may break rules without purely malicious intent.

Gray Hat hackers occupy a middle ground, sometimes violating laws or ethics without explicit authorization but typically lacking the purely malicious or profit-driven intent that characterizes Black Hat hackers.

Security providing organizations are companies or entities that offer security services and are not a classification of individual hackers.