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

You’ll be able to choose between receiving a code on your phone via SMS, getting a prompt on another of your devices, setting up an authenticator app, or a USB security key.

From Popular-Science

Microsoft accounts also let you go passwordless when using their authenticator app.

From Popular-Science

You go to log in to a site or fire up an app, and instead of being asked to enter a password you get a prompt to enter a six-digit code from your authenticator app, tap a notification on your phone, or click a link sent to your email.

From MIT Technology Review

That’s not the case with an authenticator app, which makes it more secure.

From Popular-Science

Many services still use this method, but it’s not as secure as using an authenticator app.

From Popular-Science

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

From The Daily Beast