10-22-2008
Wired keyboard sniffing
Are we safe using the everyday wired keyboard? Although this concept is old, I had never seen an actual implementation on the matter until a few days ago. (Four ways of sniffing the electromagnetic emanations of wired keyboards currently on the market in up to 20 meters.)
Check the videos at: http:// lasecwww dot epfl dot ch/keyboard (avoiding referrers)
Any comments?
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LEARN ABOUT HPUX
xtungrabkeb
XtUngrabKeyboard() XtUngrabKeyboard()
Name
XtUngrabKeyboard - release an active keyboard grab.
Synopsis
void XtUngrabKeyboard(widget, time)
Widget widget;
Time time;
Inputs
widget Specifies the widget which has the active keyboard grab.
time Specifies the time when the grab should end. CurrentTime is acceptable.
Availability
Release 4 and later.
Description
XtUngrabKeyboard() releases an active keyboard grab by calling XUngrabKeyboard(), passing the display of widget and time.
The time argument may be a timestamp or the constant CurrentTime. If the specified time is earlier than the last-keyboard-grab time or
later than the current server time the keyboard will not be ungrabbed.
See XtGrabKeyboard() for more information about grabbing the keyboard.
Usage
Most applications will never need to issue a grab. XtAddGrab() (called by XtPopup()) can be used to implement modal popups inside an
application, and XtSetKeyboardFocus() can be used to redirect keyboard focus within an application. Neither function actually issues a
grab, and so does not interrupt event processing by other clients.
See Also
XtAddGrab(1), XtGrabButton(1), XtGrabKey(1), XtGrabKeyboard(1), XtGrabPointer(1), XtSetKeyboardFocus(1), XtUngrabButton(1), XtUngrabKey(1),
XtUngrabPointer(1).
Xt - Keyboard Handling XtUngrabKeyboard()