Two-factor authentication is a security measure that requires a user to enter two methods of identification. The benefit of two-factor authentication is reducing identity theft and online fraud.

Multi-factor authentication (also Two-factor authentication, TFA, T-FA or 2FA) is an approach to authentication which requires the presentation of two or more of the three authentication factors: a knowledge factor.

Multi Factor Authentication is the process where authentication requirement two or more factors to determine the identity of a user. Such factors can be knowledge, possession or inherence.

Two factor authentication refers to two types of security in place to authenticate a person's identity. Two factor authentication is common in banking and providing health care information because of the sensitivity of this information. To create two factor authentication, you might create two separate passwords, ask for a password and an answer to a security question, require biometrics as authentication in addition to a specific pin code or question. There are an infinite number of combinations that can be put in place depending on your budget and the technology available in your location.

a two factor mobile authentication