
What is two-factor or multi-factor authentication?
2023-04-14
Historically, passwords alone were used to prove (authenticate) to a system that you are who you say you are. Two-factor and multi-factor authentication (2FA and MFA, respectively) add additional layers of security by requiring a combination of two or more methods to authenticate who you are. The premise underlying MFA is that an unauthorized actor is unlikely to be able to supply all the factors required for access.