What is 2FA?
Two-factor authentication (2FA) is the security authentication method that requires two pieces of predetermined evidence (factors) before being granted authorization. 2FA is a subset of multi-factor authentication (MFA), the difference is the number of factors. Simply two layers of security required before a user can access an account or system. The most common examples of authentication factors used are passwords, PINs, hardware tokens, and biometrics.
There are five different types of authentication:
1) Possession factor - something you have
- Hardware token
- Software token
- ID Badge
- OTP token
2) Knowledge factor - something you know
- Password/Passphrase
- PIN
- Touchscreen swipe
3) Inherent factor (biometrics) - something you are
- Fingerprint scan
- Facial scan
- Vein scan
- Voice recognition
4) Location factor - somewhere you are
- Geography (geo-location)
- IP Address
- Local proximity
5) Behavioral factor - something you do
- Handwriting style
- Typing speed
- Movement dynamics
- Motion sensors
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