SCADA and Control System Security - Views From An Expert

Joseph Weiss is one of the leading experts in control system security. He provides some interesting insights about control systems and including SCADA, DCS and PLC and the security issues surrounding these in an interview found here.

He explains among other things that "A control system has several unique attributes. Number one, a control system must be absolutely highly reliable. It can't shut down very often. So, unlike a business system where you can shut it down over the weekend, the system that controls the power plant must have almost 100 percent reliability or some form of backup to maintain the 100 percent reliability. It is extremely important." This characteristic brings in itself a very unique perspective about security implementation related to control systems.

In a later part of the interview he has this to say about control systems getting hit: "My very, very, very strong feeling is, if and when we get hit, we will never know why we were hit. All we will know is breakers are opening, valves are closing, certain things are happening. But we won't have a clue as to why."

The interview contains a lot of other interesting insights and examples of incidents and lessons learnt that would be useful for anybody interested in CNII and control systems in particular. >> More ..