The term "black hat" is often used to describe individuals or organizations that engage in unethical or illegal activities. In the context of technology and internet security, black hats are hackers who use their skills to break into computer systems and steal sensitive information. Some synonyms for black hat include cybercriminal, hacker, malicious actor, and dark operator. These terms all refer to individuals who use their technical knowledge for illicit purposes. It is important to note that not all hackers are black hats, as some use their skills for ethical and legal purposes, commonly referred to as "white hat" hackers.