Enabling Two Factor Authentication for your Trello account
Two Factor Authentication (also known as 2FA), allows you to add a layer of verification to the login process, requiring a different piece of information in addition to your email address and password. The purpose of 2FA is to make it more difficult for an attacker to gain control of your account by requiring a code that is only accessible via a second authentication device. Trello currently supports text message (SMS) and backup codes as Two Factor Authentication codes.
Please Note: By requiring another layer of verification to access your Trello account, there's an additional responsibility on the user to maintain access to their two factor authentication device and backup codes.
You will no longer be able to recover your account simply by resetting your password via the email address(es) on your account. Just like with non-2FA-enabled accounts, Trello Support is unable to grant access to any account secured by two factor authentication.
How Two Factor Authentication works
After enabling Two Factor Authentication (see below for details), this is what it will look like to log in to your Trello account.
You'll start as normal, but logging in at https://trello.com/login.
You'll then be brought to a page which asks you to enter your Two Factor Authentication Code:
At the same time, Trello will send you a text message with your verification code to the phone number you used when setting up Two Factor Authentication.
Enter the number from the text message you received or one of the numbers in your list of backup codes. Click Log In to complete the login process.
Enabling Two Factor Authentication
You can visit https://trello.com/2fa to enable Two Factor Authentication for your account. You'll need to log into your Trello account with email and password to see that page.
Before clicking the big green button to add Two Factor Authentication, we strongly recommend that you print out backup codes, in case you lose access to your authentication device.
Disabling Two Factor Authentication
Once enabled, you can visit https://trello.com/2fa to disable Two Factor Authentication for your account. You'll need to log into your Trello account with email and password to see that page.