Safety via Security
Safety is important in any industrial environment, but in some industries special precautions must be followed to ensure ongoing safe operation. Many sites use a Safety Instrumentation System (SIS) to monitor the plant process and override the control system if critical parameters go outside of normal limits.
It's well documented that cyber security incidents can compromise the operation of control systems. The same thing can happen to your SIS. What steps have you taken to protect it?
The conclusion is unavoidable: cyber security is vital to achieving safe operation. That's why your network design should include special protection for your Safety Instrumentation System, by isolating the SIS into its own network security zone and protecting that zone with the Tofino Security Appliance.