  On a regular basis, we read in the news about cyber-attacks on critical
infrastructures, such as power plants. Such infrastructures rely on the
so-called Industrial Control Systems (ICS) / Supervisory Control And Data
Acquisition (SCADA) networks. By hacking the devices in such systems and
networks, attackers may take over the control of critical infrastructures, with
potentially devastating consequences. This report focusses on critical
infrastructures in the Netherlands and investigates three main questions: 1)
How many ICS/SCADA devices located in the Netherlands can be easily found by
potential attackers?, 2) How many of these devices are vulnerable to
cyber-attacks?, and 3) What measures should be taken to prevent these devices
from being hacked?
