A Probe into Process-Level Attack Detection in Industrial Environments from a Side-Channel Perspective

Process-level detection of cyberattacks on industrial control systems pertain to observing the physical process to detect implausible behavior. State-of-the-art techniques identify a baseline of the normal process behavior from historical measurements and then monitor the system operation in real time to detect deviations from the baseline. Evidently, these techniques are intended to be connected to the control flow to be able to acquire and analyze the necessary measurement data, which makes them susceptible to compromise by the attacker. In this paper, we approach process-level attack detection from a side-channel perspective, where we investigate the feasibility and efficacy of monitoring industrial machines through external sensors. The sensors measure physical properties of the process that are bound to change during a cyberattack. We demonstrate the viability of our approach through simulations and experiments on real industrial machines.