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whitehat (pluralwhite hats)(idiomatic)

1. Agoodperson; ahero.
   • 1982 December 25, Peg Byron, “The 1982 New York Gay Film Festival”, inGay Community News, volume10, number23, page 8:

     Berlin-Harlem showed relentless racism, including from the so-called friends of a black ex-GI in Berlin, without putting its central character in a 'white hat' either.

2. (computing, computer security, slang) Awell-meaninghacker whohacks for a goodcause or toaid acompany,organization, orgovernment withoutcausingharm (for example, toidentifysecurityflaws).
3. (slang) Asailor.

• black hat
• gray hat

• white hat (computer security) on Wikipedia.Wikipedia

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