Two-factor authentication is a standard method used by companies to ensure the person logging onto a secure website (such as myPPL) is an authorised user for the account they are trying to access.
This process requires a unique code to be entered on the login screen, which is sent to the user via another contact method (for myPPL, the code is supplied via email). It ensures the identity of the user who is trying to log in is verified by other information held about them. Therefore, if a user’s password is compromised it makes it much harder for someone else to access the account.