Two-factor authentication can include something you have and one of the following:

Two-factor authentication can include something you have and one of the following:

• Something you make up
• Something unique
• Something encrypted
• Something you know 

EXPLANATION

Multi-factor authentication is a method of confirming a user's claimed identity in which a user is granted access only after successfully presenting 2 or more pieces of evidence to an authentication mechanism: knowledge, possession, and inherence.

Authentication is the first step in access control, and there are three common factors used for authentication: something you know, something you have, and something you are. This article provides you with good understanding of the three factors of authentication and how they can be used together with multifactor authentication.