authenticator

[ aw-then-ti-key-ter ]

noun

1. a person or thing that authenticates.
2. Cryptography. a code used to authenticate a previously transmitted code.

Word History and Origins

Origin of authenticator¹

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

Example Sentences

According to one authenticator of sports memorabilia, his clients are not optimistic.

From The Daily Beast