Multifactor Authentication (MFA): Only as strong as the weakest link in the chain
Multifactor authentication (MFA) is a method of increasing the security of online services that uses multiple factors to verify a user’s identity. There are three basic factors used in authentication: knowledge, possession and biometrics. Knowledge-Based Procedure The knowledge-based method verifies what the user knows. An example of this type of multi-factor authentication is the use of so-called “Knowledge-Based Authentication” (KBA) questions. Here, the user must answer a series of personal questions during registration, the answers to which only he or she should know.