![]() ![]() Database connections may be easy to encrypt, while a PLC connection could be difficult. If any connections aren’t encrypted, make sure access to that network is secured. “There’s nothing like getting your hands dirty to understand your connections and how everything works inside the system overall,” McClusky said. While some security tools can automate this diagram, McClusky still recommends creating the diagram manually. It lets you know where the weak points are and where potential attack factors could be from bad actors trying to get to the system overall,” he says. “Think of this as the item that allows you to have a picture of how your security is looking at the moment. ![]() Diagram all network trafficĬreating a diagram that shows all network traffic between Programmable Logic Controllers (PLCs), devices, external software systems, and your chosen HMI/SCADA/MES/IIoT platform is the foundation for intelligent decision making, says McClusky. Each step builds on the ones before it, so consider implementing in sequential order. While organizational circumstances may be different, these best practices can guide any organization looking to step up their security. But deciding what “fully secured” looks like for an organization will depend on specific needs and resources, from available budget and existing software and hardware to actual security risk. When organizations talk about implementing security measures for their SCADA system, “most folks want everything fully secured,” says Kevin McClusky, co-director of sales engineering at Inductive Automation. ![]()
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