Random number generators are generally crackable, and some versions of the Debian openssl implementation (used in maemo) is known to be weak (ref http://talk.maemo.org/showthread.php?t=20077)

The solution is to use noise from the CCD as a random number generator. The n800 CCD is quite noisey (when the camera is not ejected, the black screen shows copious random noise).

It's also more convenient than asking the user to doodle and press random buttons.