DataTerminology.comNEW
Also known as: MFA
An authentication method requiring two or more independent credentials to verify a user’s identity.
DESCRIPTION
MFA strengthens access control by combining factors such as knowledge (password), possession (device or token), and inherence (biometrics). Phishing-resistant MFA uses standards like FIDO2/WebAuthn. Policies often mandate MFA for privileged accounts and remote access. Implementations include push approvals, TOTP apps, hardware keys, and SMS codes (less secure). Regulatory frameworks increasingly require MFA for sensitive systems.
ALTERNATIVE DEFINITIONS
Microsoft Learn
Multi-factor authentication (MFA) is an authentication method that requires the user to provide two or more verification factors to gain access to a resource.
Directly states multi-factor requirement and access control context.
NIST SP 800-63B
Multi-factor authentication refers to the use of more than one distinct factor for authentication.
Defines factors per federal digital identity guidelines.
OWASP Cheat Sheet
Multifactor authentication (MFA) is a security enhancement that requires you to present two or more pieces of evidence (factors) to authenticate.
Frames MFA as a security enhancement and clarifies factors.
RELATED TERMS
Two-Factor Authentication FIDO2 WebAuthn TOTP Authenticator App SMS One-Time Password Zero Trust Identity Management Phishing-resistant MFA Single Sign-On
COMPETING TERMS
Single-Factor Authentication Password-only Authentication
RELATIONS
- Broader: Authentication
KNOWLEDGE AREAS
Data Security Data Privacy & Compliance Infrastructure Software Engineering
TARGET AUDIENCE
Security Architect Cybersecurity Engineer Chief Information Security Officer DevOps Engineer Cloud Architect Software Developer IT Manager Application Administrator
EXTERNAL SOURCES
- Wikipedia - Multi-factor authentication
- NIST - Federal digital identity guideline
- Microsoft - Microsoft Azure MFA overview
- OWASP - Practical MFA best practices
- CISA - Guidance on phishing-resistant MFA
TOP QUESTIONS
Why is Multi-Factor Authentication critical for modern systems?
MFA significantly reduces account compromise from password theft or phishing. It adds independent verification, making attacks harder. Many breaches are preventable with MFA.
Category: Relevancy
What are the common MFA factors?
Knowledge (password/PIN), possession (token/phone), inherence (biometrics). Phishing-resistant factors use hardware keys or platform authenticators via WebAuthn/FIDO2.
Category: Example
What mistakes occur when implementing Multi-Factor Authentication?
Relying on SMS codes despite SIM-swap risks, ignoring backup methods, and poor user education can undermine protection. Enforce strong enrollment and recovery processes.
Category: Mistakes
What is the risk of not using Multi-Factor Authentication?
Credential stuffing and phishing succeed more often, elevating breach risk. Attackers can laterally move quickly once they access privileged accounts.
Category: Risks
How does Multi-Factor Authentication fit into Zero Trust?
MFA is foundational to verifying identities continuously. It complements device posture checks, least privilege, and microsegmentation.
Category: Management
Is Two-Factor Authentication the same as Multi-Factor Authentication?
Two-Factor is a subset of MFA: exactly two factors. MFA allows two or more factors. Both strengthen security compared to single-factor.
Category: Misunderstanding
Which MFA methods are most phishing-resistant?
Hardware security keys and platform authenticators using WebAuthn/FIDO2 are highly resistant. Push approvals can be abused if users accept blindly.
Category: Opinion
How should organizations roll out Multi-Factor Authentication?
Start with privileged and remote-access accounts, then expand to all users. Provide secure recovery, education, and clear policy exceptions.
Category: Requirements
What regulations mention Multi-Factor Authentication?
Frameworks like NIST 800-63, PCI DSS, SOC2, and various sector guidelines encourage or require MFA for sensitive access.
Category: Topic