2FA (Two-Factor Authentication) and MFA (Multi-Factor Authentication) are security measures used to protect accounts and systems by requiring multiple forms of verification. Here’s what they mean:
Two-Factor Authentication (2FA):
• Definition: A subset of MFA that specifically requires two distinct factors of authentication.
• Factors Used:
1. Something you know: Password, PIN, or answers to security questions.
2. Something you have: A physical device like a smartphone, hardware token, or authentication app (e.g., Google Authenticator).
3. Something you are: Biometric data like a fingerprint, face scan, or retina scan.
• Example: Logging in with a password (something you know) and then entering a code sent to your phone (something you have).
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Multi-Factor Authentication (MFA):
• Definition: A broader term that refers to any authentication system requiring two or more factors.
• Factors Used: Can combine multiple forms of the above (e.g., password, fingerprint, and a one-time code).
• Example: Accessing a secure system by:
1. Entering a password.
2. Using a fingerprint scan.
3. Providing a time-based code from an authentication app.

Why Use 2FA/MFA?
1. Enhanced Security: Protects against unauthorized access even if one factor (e.g., a password) is compromised.
2. Compliance: Many industries require MFA for regulatory reasons.
3. User Confidence: Provides users peace of mind that their accounts are secure.