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authenticator

American  
[aw-then-ti-key-ter] / ɔˈθɛn tɪˌkeɪ tər /

noun

  1. a person or thing that authenticates.

  2. Cryptography. a code used to authenticate a previously transmitted code.

Etymology

Origin of authenticator

First recorded in 1860–65; authenticate + -or 2

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.