If Ankama Shield is activated and your login information is unfortunately stolen by a thief, the thief's computer won't be recognized. The thief won't be able to steal your account and in-game actions will be limited.
This is what we call putting the account in "restricted mode". With the exception of account-to-account transfers, we don't allow any action on the account and in the DOFUS game that could harm its owner.
Please note: In the case of logging in with Facebook or Steam, the account is protected by Facebook's or Steam's security measures and not by the protection offered by Ankama Shield.