What is Multi-factor Authentication?

Multi-factor authentication (MFA) is a security mechanism that requires users to provide multiple forms of authentication in order to access a system or application. MFA typically involves something the user knows (such as a password), something the user has (such as a security token or smart card), or something the user is (such as a biometric identifier like a fingerprint).

Why is it Necessary?

Multi-factor authentication (MFA) is necessary because it provides an additional layer of security beyond just a username and password, which can be easily compromised by attackers. With MFA, users are required to provide additional authentication factors, such as a fingerprint or a security token, which makes it much more difficult for attackers to gain unauthorized access to sensitive systems or data.

By requiring multiple factors of authentication, MFA can greatly reduce the risk of credential theft and other types of attacks, such as phishing and social engineering. Even if an attacker is able to obtain a user's password, they would still need to have access to the additional authentication factor in order to gain access, which significantly reduces the likelihood of a successful attack.

MFA is especially important for protecting sensitive data and systems, such as financial accounts, healthcare systems, and other critical infrastructure. In addition, MFA can also help organizations comply with various regulations and standards, such as the Payment Card Industry Data Security Standard (PCI DSS) and the General Data Protection Regulation (GDPR), which require strong authentication measures to protect sensitive data. Overall, MFA is a critical security measure that can help organizations to better protect their systems and data from a wide range of threats.

Recommended Multi-Factor Solutions

Solution	Features	Pricing	Rating
Google Authenticator	Time-based one-time password (TOTP) authentication app	Free	4.5/5
Microsoft Authenticator	TOTP and push notification-based authentication app	Free	4/5
Duo Security	TOTP, push notification, SMS, phone call, and biometric-based authentication	$3/user/month	5/5
Okta	TOTP, push notification, SMS, phone call, and biometric-based authentication	$3.50/user/month	4/5
Authy	TOTP, push notification, and SMS-based authentication app	$1/user/month	4/5
RSA SecurID	TOTP, push notification, SMS, phone call, and biometric-based authentication	Consultation required	3.5/5
YubiKey	Hardware-based authentication device that supports various protocols, such as TOTP, smart card, and FIDO2	$45	4.5/5
Symantec VIP	TOTP, push notification, and biometric-based authentication	Consultation required	3/5