> > It is normally used for both unlock and login. 
> It is a generic
> > implementation of a Secure Attention Key (SAK),
> without which Linux is
> > actually less secure than Windows.
> 
> Never heard of it, nor have I ever seen CTRL+ALT+Del in
> Linux

For years I have been using Ctrl-Alt-Del to exit KDE. I also for many years have been using Ctrl-Alt-Del at the console to reboot.

Lots of people disable the latter for true multi-user systems.

> > The SAK support can be turned off in the KDM control
> center module.
> 
> I don't see it anywhere under Login Manager or KDM Theme
> Manager. These are the only two modules that show up when I
> type kdm into the search box for kcontrol.

Under the Appearance tab, last item on the bottom. If you don't have that option was your package built with SAK support?

Darrell