"On the one hand it's hard to do certain kinds of security on OT systems. That's why you still see xp systems sitting around. But on the other hand, just because it's hard to do security doesn't mean you can throw your hands up and say "Well then I guess we won't do anything", because the threat environment keeps getting worse. Doing things the normal way can be difficult...but we have to do something. " - Andrew Ginter, VP of Industrial Security, Waterfall Security Solutions