Multi-Factor Authentication (MFA)
What is two-factor authentication and why is it used?
Two-factor authentication (2FA), sometimes referred to as two-step verification or dual-factor authentication, is a security process in which users provide two different Authentication factors to verify themselves.
2FA is implemented to better protect both a user's credentials and the resources the user can access.
Itprovides a higher level of security than authentication methods that depend on single-factor authentication (SFA) in which the user provides only one factor - typically, a password or passcode.
The Two-factor authentication methods rely on a user providing a password as the first factor and a second, different factor - usually either a security token or a biometric factor, such as a fingerprint or facial scan.
It adds an additional layer of security to the authentication process by making it harder for attackers to gain access to a person's devices or online accounts because, even if the victim's password is hacked, a password alone is not enough to pass the authentication check.
It has long been used to control access to sensitive systems and data.
Online service providers are increasingly using 2FA to protect their users' credentials from being used by hackers who stole a password database or used phishing campaigns to obtain user passwords.