A security process that requires users to provide two or more verification factors to access a resource, such as a website, application, or online account.
This enhances security by adding layers of authentication, making it harder for unauthorized users to access sensitive information.
Real-World Examples
Banking App: Logging in requires a password and a code sent to your phone. Work Email: Accessing email from outside the office requires a password and confirmation via an authenticator app. Social Media: Logging in from a new device prompts a password and a code sent to your email or phone.