1 xspy is a utility for monitoring keypresses on remote X servers. It
2 takes advantage of an oversight in X Windows (R5 & R6) to find out
3 about keypresses even in "secure mode". It works by polling the
4 keyboard, by default every hundredth of a second.
6 WWW: http://www.acm.vt.edu/~jmaxwell/programs/xspy/xspy.html