Using that system, Brazilian citizens can consult information regarding their income tax declaration and refund, for instance.
In Brazil, an example such a website is eCAC, a system of the Receita Federal (the Brazilian federal revenue service agency).
US Department of Defense (DoD) limits access to many of its websites to be via a Common Access Card (CAC), a kind of smart card. Many government and military websites require you to log in using a digital certificate. A USB token looks like a USB stick, but it is a criptographic medium: it stores only digital certificates.
