SCADA system Scaling

We now present om system model which describes a large-scale SCADA system along with the data model and a fault/attack model. The system model gives an overview of the node tjq)es in the system and how they interact with each other. The data model specifies the different data flows and control loops within the SCADA system. Pmthermore, the attack and fault model describes faults and attacks that are addressed by our solution to enhance the overall SCADA system resilience. Finally, requirements for SCADA systems are presented to provide mitigation for the considered faults and attack classes. 

Interoperability. For the multitude of different node types present in a large-scale SCADA system, it is beneficial to mask the nodes heterogeneity. This lowers the customization efforts and eases the solution s deployment. 

We evaluated [16] the choice of suitable P2P technology for SCADA systems. Regarding the requirements of interconnected large-scale SCADA systems, structured P2P networks with Distributed Hash Tables (DHT) are appropriate for three reasons, i.e., (i) low routing latencies, (ii) good scalabihty, and (iii) data discovery guarantees in DHTs [16]. 

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