A feature that requires a user to confirm that they are logging in on two separate devices in order to access the app. It usually takes between 5.4 and 6.6 hours and costs $450 to add 2FA (2 Factor Authentication) to an application.

This is a security feature for user login. Two-factor authentication allows a user to specify a phone number to receive a text. The text is sent to them each time they log in. It can contain text input fields, and integration of an SMS service.

Here are some common 2FA (2 Factor Authentication) user stories in a custom app build:

As an app user, I would like to enable or disable 2FA for my user account.