We propose a methodology to design a resilient ICT system that defines the tasks to achieve resilience and then maps the system modules onto three planes that implement the system functions, monitor the system to discover ongoing attacks and faults, and reconfigure the system so that it continues to offer its services even when under attack. The three planes define the overall system structure and simplify the implementation of the tasks to support resilience. The paper also reviews the main ICT technologies that support the various tasks to achieve resilience.
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