Ah, but where do you draw the line between 'security sensitive tasks' and the rest? Is the keyboard driver security sensitive? What about pointer drivers (mouse

Ah, but where do you draw the line between 'security sensitive tasks' and the rest? Is the keyboard driver security sensitive? What about pointer drivers (mouse, touch, etc)? Voice input, is that security sensitive? Video? Draw the line too tight and performance will really suffer, make it too loose and all that effort is for naught.