Secure Blockchain-Based Supply Chain Management with Verifiable Digital Twins

A major problem in blockchain-based supply chain management is the unclear validity of digital twins when dealing with digital representations of physical goods. Indeed, the use of blockchain technology to trace goods is ineffective if there is no strong correspondence between what is physically exchanged and the digital information that appears in blockchain transactions. In this work we propose a model for strengthening the supply chain management of physical goods leveraging blockchain technology through a digital-twin verification feature. Our model can be instantiated in various scenarios and we have in particular considered the popular case of food traceability. In contrast to weaker models known in the literature that propose their own ad-hoc properties to assess the robustness of their supply chain management systems, in this work we use the formalism of secure computation, where processes are described through generic and natural ideal functionalities.