black hat


Definition of black hat 

: a hacker who infiltrates a computer system for malicious purposes (as to disable a website or uncover secret information) In one segment … Assange reflects on his work as a black hat hacker in the early 1990s, recalling wistfully how he and others hacked into the Pentagon's Security Coordination Center.— Kim Zetter — compare white hat

First Known Use of black hat

1990, in the meaning defined above

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The first known use of black hat was in 1990

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to enclose within walls

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