Whitehatted

white hat

noun Informal.
a virtuous hero, especially in a cowboy movie; good guy. Compare black hat ( def 1 ).

white-hat, white-hatted, adjective
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World English Dictionary
white hat
 
n
informal
 a.  a computer hacker who is hired by an organization to undertake nonmalicious hacking work in order to discover computer-security flaws
 b.  Compare black hat (as modifier): a white-hat hacker

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