unauthenticate

Verb

unauthenticate (third-person singular simple present unauthenticates, present participle unauthenticating, simple past and past participle unauthenticated)

1. (transitive) To refuse to authenticate; to render inauthentic.
   • But we may be more certain of the motive and merit of Addiſon, which was no leſs than the ſacrifice of old love (And O! how hard the ſcience to forget!) at the altar of Virtue (till ſome future Nævius ſhall diſpute the fact and unauthenticate the letter) than we are of Scipio’s difficulty in...1783, [Thomas Tyers], An Historical Essay on Mr. Addison, London, page 27
   • No record was found pertaining to the 1804 dollar but on a slip of paper was found what is accepted as a satisfactory explanation of the always reported 321 silver dollars coined in 1805. No one has ever seen this coin and its non existance^([sic]) and the belief that none were issued has done much...1903 August, Farran Zerbe, “Pick Ups During a Visit to the New Mint at Philadelphia”, in The Numismatist, volume 16, number 8, Monroe, Mich.: American Numismatic Association, page 246
2. (transitive) To withdraw the authentication of.
   • One advantage to using this approach is that you can “unauthenticate” a user at any time by sending the HTTP 401 header again. You may want to do this to force users to log in again after a certain timeout period or to provide different authentication requirements for the different areas of your...2001, Blake Schwendiman, “Authentication” (chapter 8), in PHP4 Developer’s Guide, New York, N. Y.: McGraw-Hill, →ISBN, page 148
   • You can set up the client not to authenticate, but if you do so, be warned that man-in-the-middle attacks will be easy to perform. Unauthenticating client proxies only buys you security against the most naïve eavesdropping attacks, but is still better than no protection at all.2002 June, John Viega, Matt Messier, Pravir Chandra, “Introduction” (chapter 1), in Network Security with OpenSSL, Sebastopol, Calif.: O'Reilly Media, Inc., →ISBN, page 26