What term describes hackers who break into systems without authorization or permission?

The term that describes hackers who break into systems without authorization or permission is "Black Hats." Black Hat hackers engage in illegal activities, often with malicious intent, such as stealing data, spreading malware, or causing disruption to systems. Their actions are detrimental to organizations and individuals, as they disregard ethical guidelines and laws governing digital security.

In contrast, White Hats are ethical hackers who work to improve security by finding and addressing vulnerabilities in systems, often with proper authorization. Gray Hats occupy a middle ground, sometimes operating without permission but often without malicious intent, typically notifying the affected organizations after discovering a vulnerability. Blue Hats are often associated with security professionals who are invited to test systems or software for vulnerabilities, but they do not engage in illicit hacking activities.