> Bottom line: If a digital control (SCADA, DCS, PLC, etc.) can be > manipulated to cause a system failure, then the control system is > badly designed and lacks the appropriate safety systems dictated by > standard control system design practices.
Disagree. There are too many cases where the difference between "failure" and "correct operation" lies only in human-layer intent. As a simple example, if it is possible to shut something down through digital control (for maintenance, say), then it is possible to shut it down maliciously as well. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mo...@rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B _______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
