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gray hat

[grey hat] /ˈgreɪ ˈhæt/
noun, Digital Technology, Informal.
a hacker who violates the security of a system without true malicious intent but often without the prior knowledge or consent of the owner or developer, and who later reports system vulnerabilities to the authorities, sometimes for personal profit.
See also black hat, white hat.
Origin of gray hat
First recorded in 1995-2000 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for gray hat
Historical Examples
  • “Cass wore a gray hat too, seems to me,” Mackenzie contributed, scratching his gray hair.

    Crooked Trails and Straight William MacLeod Raine
  • His gray hat was pushed aslant as his head rested against hers.

    Rowdy of the Cross L B.M. Sinclair, AKA B.M. Bower
  • He saw the gray hat waved wildly, but the voice was ravished from him by the wind of the train.

  • But don't forget, my boys, to bring that coat and gray hat back to Madame Louchard.

    Monsieur Cherami Charles Paul de Kock
  • Judith stepped down and stood beside the linen duster and gray hat, fervently wishing she had stayed at home.

    Growing Up Jennie M. Drinkwater
  • The coachman afterward related how Luther in the haste of the flight dropped a gray hat he had worn.

  • I have told this little history of a gray hat, not because it is in any way extraordinary, but because it is not.

    Crowds Gerald Stanley Lee
  • The dull yellow folds were full of it; his gray hat, pulled low over his purple ears, was heaped with it.

    Rowdy of the Cross L B.M. Sinclair, AKA B.M. Bower
  • He was startled by a shot, that struck his gray hat simultaneously with the report.

    In the Roar of the Sea Sabine Baring-Gould
  • His gray hat was tilted rakishly up at the back and down in front, and a handkerchief was knotted loosely around his throat.

    Her Prairie Knight B.M. Sinclair, AKA B. M. Bower

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