Two Factor Authentication (2FA) or Multi-factor Authentication (MFA) is the most common preventative measure that companies and organizations implement as an additional layer of security to the standard username and password login credentials on a website or application. Taking a half-step back, 2FA/MFA can be described as something you know and something you have. 2FA/MFA is currently used on almost every application, from banking websites to SaaS services to video games


