GSA Authentication for Secured Access

[Valan]

Hi,
When we access a secured content through GSA, it shows the dialog box
for providing credentials, once provided users can access the
contents, but it is not secure, because if i provide any other user
credentials then i can able to access the content which is related to
him.

Scenario: The client machine is connected to ADS through LAN, if the
user is logged into their machine means, he is already authenticated,
in this secnario it should not ask/show the dialog.

Is this possible? if yes, then what setting i should do to make things
work.

Thanks in Advance
Regards
Valan