Issue link: https://resources.mouser.com/i/1437657
35 Industry 4.0 and Beyond | ADI With the cyberattack surface changing, an increased security risk and a greater need for security solutions at the edge has arisen. Factories must adopt a resilient posture against cyberattacks, meaning the ability to detect and recover when an attack takes place. The question is no longer: If I will get hacked, but when will I get hacked. Building a connected factory requires smart edge devices to recover from attacks. This requires security to be implemented at the lowest level—the hardware itself. Trusting the lowest levels of a device's boot-and-issue software updates enables a factory to recover quickly and resume normal operations. You are the head of a leading manufacturer in charge of North American operations working through a normal day when suddenly you get a report from one of your largest factories that shows a list of product defects. The trend appears to have started some time ago and keeps climbing, but the factory manager can't seem to locate the source of the defect. Everything in the factory seems to be running as intended. Do we take the equipment offline to run more detailed diagnostics? Or do we continue and hope the trend ceases and product output reverts to normal? Finally, you reach the decision: The equipment will come offline for non-routine maintenance. After hours of diagnostics, a breakthrough is made. Everything looks normal on the surface, but a strange anomaly with the programmable logic controller (PLC) software has happened. With further diagnostics, it becomes evident that the factory was hacked. But why was this not discovered earlier? The hackers must have been very clever and kept the malicious code hidden so that the operators would think everything was normal. After weeks of progressively increasing defects and taking equipment offline, the factory is back up and running. But were we successful in quarantining all the affected equipment? Fortunately, we require all factory-floor devices, including the drives and servos, to have a hardware root-of-trust to confidently push a software update to all potentially affected machines globally. Maybe this update will save our plant in Japan from having the same issues. Figure 1: As the cyberattack surface continues to shift, there is an increasing need for security solutions at the edge. (Source: Analog Devices Inc.) 1