Black-hat



a villain, as in a cowboy movie; bad guy.
Digital Technology. a hacker who violates the security of a system for personal profit or for the gratification of causing damage.
wear / put on a black hat, to behave villainously.
noun
(informal)

a computer hacker who carries out illegal malicious hacking work
(as modifier): black-hat hackers Compare white hat

A villain; heavy: The only way I can do that is to make you the black hat/ This time, perhaps, there are black hats on both sides
he badge or symbol of a villain: Companies have this black hat on when they go to court

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