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1. Oxford American Dictionary

   white hat

   • n.
     a good or moral person, especially the hero in a movie, novel, or play；a person who hacks into a computer network in order to test or evaluate its security systems

   • noun: white hat, plural noun: white hats

2. • 釋義

   n.

   名詞

   • 1. a good or moral person, especially the hero in a movie, novel, or play that account, dominated as it is by conflict between black hats and white hats, is hardly the whole truth
   • ▪ a person who hacks into a computer network in order to test or evaluate its security systems while security dudes tend to speak in terms of black or white hats, it seems to me that nearly all hats are in varying shades of grey
3. • 更多解釋

   white hat

   • n.
     a good or moral person, especially the hero in a film, novel, or play: that account, dominated as it is by conflict between black hats and white hats, is hardly the whole truth

   Oxford Dictionary