1, 2, 3 Authentication factors are ways in which we make our security strong both online and offline.
1fa
Knowledge factors include things a user must know in order to log in: User names, IDs, passwords and personal identification numbers (PINs) all fall into this category.
2fa
Possession factors include anything a user must have in his possession to log in. This category includes one-time password tokens (OTP tokens), key fobs, smartphones with OTP apps, employee ID cards and SIM cards.
3fa
include any biological traits the user has that are confirmed for log in. This category includes the scope of biometrics such as retina scans, iris scans, fingerprint scans, finger vein scans, facial recognition, voice recognition, hand geometry and even earlobe geometry.
Three-factor authentication is mainly used in businesses and government agencies.
Facebook, Twitter, LinkedIn among others have these settings.
Utilizing it will make it difficult or even prevent cyber-terrorists from violating your privacy.
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