On Tuesday 22 November 2011 10:47:12 pm Timothy Pearson wrote:
Whenever my screen locks (e.g. from my screen saver or from manually locking) and I go to unlock, I'm told to press CTRL+ALT+Del, and it
says
it's displaying that so the login screen doesn't get spoofed.
When logging out, I get a window saying it's saving my settings.
Both of these remind me of WinXP. The CTRL+ALT+Del thing is of WinNT
(XP
is based on NT).
Is there a way to turn this off?
Also, if the CTRL+ALT+Del thing is used for unlocking, why not too for logging in?
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
The problem boils down to the fact that I can make a perfect copy of the login (or lock) screen, leave it running as a non-priviledged user (e.g. on a public computer), and grab your password. There is no way for you to know the real login screen from a good fake. The SAK allows the operating system to reserve a secure keypress (in this case Ctrl+Alt+Del) that no userspace application will ever be able to see, therefore preventing emulation of the logon sequence before any passwords are typed.
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.
Look for Login Manager in kcontrol.
Also, if you really don't like the startup/shudown splash screens simply select a splash screen other than "Unified". Many users here like to have feedback that their computer is actually doing something once logout has been pressed, but to each their own. ;-)
Tim