On the adoption and deployment of secure and privacy-preserving IIoT in smart manufacturing: a comprehensive guide with recent advances

The adoption of the Internet of Things (IoT) in smart manufacturing has recently seen a boost in economic and technological
advancement. This is attributed to improved operational efficiency resulting from streamlined interoperability, decreased
downtime, and real-time processing as compared to conventional manufacturing industries. It also brings with it a massive
deployment of intelligent systems and devices from both the Information Technology (IT) and Operational Technology
(OT) realms within the Industrial IoT (IIoT) infrastructure, thus creating a heterogeneous interconnectivity. However, such
inherent interconnectivity introduces significant security and privacy challenges. To mitigate these challenges, researchers
and cybersecurity experts have recently proposed different defense mechanisms for the different facets of the cyber landscape
within the IIoT infrastructure. Nevertheless, most of these techniques require major technical expertise to be implemented.
Also, there is a lack of specific follow-through guides on how to adopt and implement such mechanisms. This paper aims to fill
that gap by providing in-depth guidance on adopting and deploying different defense mechanisms designed to mitigate various
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cyber threats while ensuring secure and privacy-preserving IIoT infrastructure. The article first emphasizes the implications of
cyber threats targeting IIoT tools and infrastructure as well as vulnerabilities emerging due to IT and OT convergence. It then
delves into recent state-of-the-art protection mechanisms designed to mitigate these attacks based on a robust framework that
includes all defenses. In addition, comprehensive guides to be adopted for a secure and privacy-preserving IIoT are provided.
Finally, other challenges and open research questions are presented to pave the way towards efficient deployment of secure
and privacy-preserving schemes for the IIoT in smart manufacturing.