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[aw-then-ti-keyt] /ɔˈθɛn tɪˌkeɪt/
verb (used with object), authenticated, authenticating.
to establish as genuine.
to establish the authorship or origin of conclusively or unquestionably, chiefly by the techniques of scholarship:
to authenticate a painting.
to make authoritative or valid.
Origin of authenticate
1565-75; < Medieval Latin authenticātus made authentic (past participle of authenticāre). See authentic, -ate1
Related forms
authenticatable, adjective
authentication, noun
nonauthenticated, adjective
nonauthentication, noun
reauthenticate, verb (used with object), reauthenticated, reauthenticating.
reauthentication, noun
self-authenticating, adjective
unauthenticated, adjective
well-authenticated, adjective
1. confirm, validate, substantiate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for authentication


verb (transitive)
to establish as genuine or valid
to give authority or legal validity to
Derived Forms
authentication, noun
authenticator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for authentication

1788, noun of action from authenticate (v.).



"verify, establish the credibility of," 1650s, from Medieval Latin authenticatus, past participle of authenticare, from authenticus (see authentic). Related: Authenticated; authenticating.

Online Etymology Dictionary, © 2010 Douglas Harper
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authentication in Technology

The verification of the identity of a person or process. In a communication system, authentication verifies that messages really come from their stated source, like the signature on a (paper) letter. The most common form of authentication is typing a user name (which may be widely known or easily guessable) and a corresponding password that is presumed to be known only to the individual being authenticated. Another form of authentication is biometrics.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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