Security Questions(KBA) -

This authentication method is based on the knowledge factor which is only known to the user. In this authentication method, the user has to configure 3 unique questions whose answers should only be known to the respective user.
Once the registration is complete and users try to log into their account any 2 questions from the set of 3 configured questions will be asked to the user. The user gains account access only if he/she can answer those questions correctly.