In recent years, there has been a shift in computing architectures, moving away from centralized cloud computing towards decentralized edge and fog computing. This shift is driven by factors such as the increasing volume of data generated at the edge, the growing demand for real-time processing and low-latency applications, and the need for improved privacy and data locality. Although this new paradigm offers numerous advantages, it also introduces significant security and reliability challenges. This paper aims to review the architectures and technologies employed in fog computing and identify opportunities for developing novel security assessment and security hardening techniques. These techniques include secure configuration and debloating to enhance the security of middleware, testing techniques to assess secure communication mechanisms, and automated rehosting to speed up the security testing of embedded firmware.

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