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This paper describes the main features of an advanced communication model aimed to enhance the protection of critical energy assets against man-made attacks (terrorism) or natural disasters. The proposed model is based on a hybrid network architecture, which combines the advantages of different wireless technologies, such as Delay/Disruption Tolerant Networking, Mobile Ad-hoc Networks, and Wireless Sensor Networks. The solution includes the definition of an extended routing protocol which takes into account the different networking technologies involved. The paper illustrates also how the hybrid network architecture can be applied to specific energy assets such as oil refineries and pipelines.