authentication

noun
au·​then·​ti·​ca·​tion | \ə-ˌthen-ti-ˈkā-shən, ȯ-\
plural authentications

Definition of authentication 

: an act, process, or method of showing something (such as an identity, a piece of art, or a financial transaction) to be real, true, or genuine : the act or process of authenticating something Historically, the authentication of art fell to connoisseurs …— Colette Bancroft Encryption and decryption, combined with user authentication, ensure that only intended recipients read the messages.— Sal Ricciardi Mostly, notaries have to be adept at the authentication arts. In an era of multiple-personality disorder, cross-dressing, sex-change surgery and bogus IDs, people aren't always who they appear to be. On the notary public rests the responsibility to verify a person's true identity and attest to it.— Colette Bancroft Giving users a way to prove that they're being harassed with, say, a screenshot or some other form of authentication could help Twitter catch bad actors, even after they've covered their tracks.— Issie Lapowsky often used before another noun authentication codesauthentication techniquesauthentication keys

First Known Use of authentication

1612, in the meaning defined above

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Time Traveler for authentication

The first known use of authentication was in 1612

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More from Merriam-Webster on authentication

Nglish: Translation of authentication for Spanish Speakers

Britannica English: Translation of authentication for Arabic Speakers

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