Abstract
The growing interest in fog and edge computing is gradually but inexorably outlining new architectural and usage models, distinguished by geographical dispersion and device heterogeneity. Unfortunately, the evolution of cyber-security paradigms has not gone with the same pace, leading to a substantial difficulty in protecting the new forms of distributed and heterogeneous systems against cyber-threats.In this paper, we focus on situational awareness for network threats. We briefly review the main limitations of current cyber-security paradigms with respect to emerging fog/edge architectures, and we discuss how current challenges and emerging trends are pushing from vertical security frameworks to horizontal and distributed architectures. In this respect, we outline the main elements and relevant technologies for a multi-layer framework that create the necessary knowledge and awareness in relation to network threats over large and heterogeneous computing and networking environments.
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