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authenticator

[ aw-then-ti-key-ter ]
/ ɔˈθɛn tɪˌkeɪ tər /
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noun
a person or thing that authenticates.
Cryptography. a code used to authenticate a previously transmitted code.
QUIZ
QUIZ YOURSELF ON “ITS” VS. “IT’S”!
Apostrophes can be tricky; prove you know the difference between "it’s" and "its" in this crafty quiz!
Question 1 of 8
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of authenticator

First recorded in 1860–65; authenticate + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use authenticator in a sentence

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