Applying F(I)MEA-technique for SCADA-Based Industrial Control Systems Dependability Assessment and Ensuring

Dependability and security analysis of the industrial control computer-based systems (ICS) is an open problem. ICS is a complex system that as a rule consists of two levels - supervisory control and data acquisition (SCADA) and programmable logic controllers (PLC) and has vulnerabilities on both levels. This paper presents results of the SCADA-based ICS dependability and security analysis using a modification of standardized FMEA (failure modes and effects analysis)-technique. The technique mentioned takes into account possible intrusions and is called F(I)MEA (failure (intrusion) modes and effects analysis). F(I)MEA-technique is applied for determining the weakest parts of ICS and the required means of fault prevention, fault detection and fault-tolerance ensuring. An example of F(I)MEA-technique applying for SCADA vulnerabilities analysis is provided. The solutions of SCADA-based ICS dependability improvement are proposed.