Cyber-interdependency in Smart Energy Systems

Critical infrastructures are highly interdependent due to the services they receive and provide to one another. These interdependencies include physical, logical, geogr aphical and cyber. Most of these interdependencies have been studied extensively apart from the cyber interdep ndency which is the main focus of this paper. Critical infrastructures have cyber interdependency when t state of a physical infrastructure (energy, transport, water, waste, etc.) depends on the information transm itted through the information infrastructure. The communication network is the backbone of smart energy syste ms and is responsible for transmission of data from all sub-systems in both directions. Due to the complexi ty and combination of many sub-systems that form smart energy systems, data is generated at different le vels within such systems. The data at each layer is different and has its own cyber characteristics. Knowing these characteristics and interdependencies at each layer provides the foundation for designing an appropriate ICT architecture that fits that segment (layer) rather than having an ICT architecture that is generic and designed for all layers but susceptible to risks. This paper outlines a new approach by focusing only on the cyber interde pendencies in smart energy systems and how they effect the Smart Grid.

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