Authenticator

Noun

1. One who, or something which, authenticates, as: An app that uses applied cryptography to prove someone's identity to a network connection. A feature that shows something to be authentic. A person employed to check the accuracy and realism of a script.
2. An app that uses applied cryptography to prove someone's identity to a network connection.
3. A feature that shows something to be authentic.
4. A person employed to check the accuracy and realism of a script.