English

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Etymology

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From de- +‎ authenticate.

Verb

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deauthenticate (third-person singular simple present deauthenticates, present participle deauthenticating, simple past and past participle deauthenticated)

  1. (transitive) To reject as authentic; to falsify or disprove.
    • 1827, Jeremy Bentham, Rationale of Judicial Evidence:
      In the hand of what person soever it be alleged by the witness to be, a case may happen in which it may be material (though at the expense of a distinct enquiry) to authenticate or deauthenticate it by ulterior evidence.
  2. (transitive, computing) To revoke the authentication of; to cause no longer to be authenticated.