Tutorial

The previous part of this three-part tutorial on information system security in industrial networks introduced the basic terminology and explained the need for security measures. This need was, in part, motivated by a number of report-ed incidents where worms infected automation systems. There is no doubt that worm infections pose a real threat for networked automation systems today. This part of the tutorial explains the different types of malware and suggests how an automation system can be defended against them. A case study is pre-sented where some of the suggested mechanisms are applied in a real-world automation system