Six tips for remote HMI/SCADA users to protect plant operations, drive cost savings
June 4, 2015
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When you wake up in the morning, you can program your coffee maker upstairs with your smartphone and get a notification when your cup of coffee is done brewing downstairs. You can also turn up the thermostat with the touch of your phone to increase the temperature before you even get out of bed. This technology is part of the Internet of Things and it is helping to make people’s everyday lives more convenient and efficient.
The Internet of Things revolves around increased machine-to-machine (M2M) communication, and is built on cloud computing and networks of data-gathering sensors. Beyond our daily lives at home, this concept is also becoming widely used in the industrial sector and has been dubbed the Industrial Internet of Things (IIoT). Now M2M technology allows us to manage and monitor equipment remotely and address problems in a timely manner, which also translates to cost savings. In fact, the average field service visit costs more than $1,000 according to data from the Technology Services Industry Association, and every eliminated field visit adds to an organization's bottom line.
A variety of M2M solutions are available that can help diagnose and fix equipment issues, including remote desktop that allows users to manage the machine/process remotely as if they were standing in front of a human-machine interface (HMI) connected to a supervisory control and data acquisition (SCADA) system. (HMI/SCADA solutions have become a widely used tool in a variety of industries, and are often at the heart of an operation’s data visualization, control, and reporting process to drive operational improvements.) A development software interface enables users to connect remotely to HMI/SCADA systems in order to make machine/process changes over the Internet without forcing unnecessary shutdowns.
While remote monitoring solutions like HMI can provide cost-savings and increased efficiency, it’s important to understand the security risks associated with this technology and how to protect against them. Past cybersecurity breaches have shown how harmful cyberattacks can be for remote activity operations in the industrial sector. For example, the Stuxnet virus is a computer worm that targeted industrial control systems that are used to monitor and control large-scale industrial facilities like power plants, dams, waste processing systems, and similar operations. The virus allows the attackers to take control of these systems without the operators knowing, and the hackers can manipulate real-world equipment. Due to Stuxnet-type viruses and other various cyber threats, there’s been an increased emphasis on HMI/SCADA security and users of HMI/SCADA systems are focusing on how to protect this key element of their operations.
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Figure 1. Paths to the Control Network from an Engineer’s Perspective
Figure 2. Paths to the Control Network from a Corporate IT Manager’s Perspective
The good news is that there are a variety of ways to secure remote access and reduce cybersecurity risks while enabling the connectivity required to support and service equipment. Users of HMI/SCADA systems can employ the following methods to help protect their systems:
HMI/SCADA systems provide remarkable efficiently and cost-savings for users and OEMs, but ensuring the security of the systems while protecting against cyber threats is crucial. Companies can first start by selecting systems with inherent security designs that can protect against a malware attack. Additionally, taking proactive steps such as working with IT to design the network interfaces and firewalls can help to minimize internal and external risks. Ultimately, these safeguards can help companies enhance the protection of their critical infrastructure assets and reduce costs.
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