> Hi Timothy ! > > To be honest I don't understand why is this "Ctrl-Alt-Del" dialog window > good for security. What kind of attack is prevented by it? > > Cheers, > > Ilya Hi Ilya, Login spoofing. http://en.wikipedia.org/wiki/Login_spoofing In a nutshell TDE intercepts ctrl+alt+del at a very low level, making it impossible for a non-privileged user to ever see the keystroke. Two TDE applications are then granted the ability to see the keystroke, specifically KDM and the desktop locker. Any other application will be oblivious to the fact that ctrl+alt+del was pressed, making it impossible to create a behaviourally accurate copy of the login screen. Tim