Construction of false sequence attack against PLC based power control system

It is essential to ensure accurate sensor measurements to safely regulate physical process in power control system. Traditional false data injection (FDI) attacks against control system mainly require the attackers to obtain the optimal malicious inputs. Different from the traditional FDI attacks, we present false sequence attack that can disable the fault detection against Programmable Logic Controllers (PLCs) with partial information about the victim system. Our attack formulation is to identify a discrete event model of collected fault-free I/O traces from compromised PLCs, and find the undetectable false sequences that are selected as desired attacks injected into compromised sensors from the identified model. A representation industrial simulation shows that we construct the false sequence attack against the control system with fault detection.