A Survivability-Aware Cyber-Physical Systems Design Methodology

Cyber-Physical Systems (CPS) are the key components of many critical infrastructures, and survivability is one of the major concerns for their reliable operation. Survivability may be defined as the ability of the system to maintain its normal operation in the presence of adversaries. Therefore, analyzing the survivability of CPS during the design phase is very important. In this paper, we introduce an approach for using Key Performance Indicator (KPI) blocks while designing the simulation models for CPS to determine their survivability at run time. We have developed a KPI library containing temporal and spatial KPI blocks. With different use case scenarios of an attacked system, we show that the combination of these two kinds of KPI blocks may help the designers to analyze the system's survivability at design time. Through experimental evaluation on the simulation models, we also show the credibility of using our proposed KPI blocks in the design of CPS.