A user, by way of a computing device, requests and receives content from a
first server at the computing device. An authentication response is also
received from the first server at the computing device of the user. The
authentication response includes an address of the second server and an
executable script. The computing device of the user executes the
executable script by issuing a request to the second server for state
information corresponding to the user, receiving the state information
from the second server; and determining, based on the state information,
whether the user is authenticated to the second server. If the user is
not authenticated to the second server, the computer device of the user
displays a login module that is visually associated with the first
server. Such login module collects login information for authenticating
the user to the second server. If the user is authenticated in the second
server, the computing device of the user issues a request to the second
server for vouching information for authenticating the user to the first
server.