Media Manager allows two factor authentication. This means you can set-up your account so your users require two methods to login to their accounts. First they must login with their username and password, then they will receive a text message via their mobile phone. In the text message will contain a PIN. This is then required to be entered into the form provided on Media Manager. If PIN is correct, then Media Manager allows user to login and continue using Media Manager. Each PIN has a lifetime of about 15 minutes, after this time the PIN becomes invalid. Once the PIN is used, it also then becomes invalid and cannot be used again.