On Mon, 13 Sep 2004 10:59:12 -0300, Roberto Gallo
<robertogallofilho@hotmail.com> wrote:

> I plan to develop a three-way authentication login system for Linux. I want
> to change the way people Logon to Linux so that a SmartCard or a USB Token
> would be required in addition to "username" and "password".

Sounds like you need to read up on "Pluggable Authentication Modules"
aka "PAM". This site <http://www.kernel.org/pub/linux/libs/pam/> has
some links and docs.


--
-| Bob Hauck
-| To Whom You Are Speaking
-| http://www.haucks.org/