Abstract
This paper considers the domain of Industrial Internet of Things (IIoT) infrastructures and the recurring need for collaboration across teams and stakeholders by means of remote access. The paper describes a secure solution beyond the traditional perimeter-based security approach, which consists of an architecture that supports multi-level authorization to achieve fine-grained access control, better scalability, and maintainability. An implementation of the proposed solution, using open-source technologies, is also discussed and covers the protection of both the network and edge domains of a complex IIoT infrastructure. Finally, the paper presents a risk-driven and model-based process that is designed to support the migration of existing infrastructures to the solution architecture. The approach is validated, taking as a reference two relevant scenarios for the aerospace industry.
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