Blockchain Service Layer for ERP data interoperability among multiple supply chain stakeholders

Companies in the supply chain recognize Enterprise Resource Planning (ERP) software as an indispensable component of their businesses that significantly helps with planning, decision-making, and cost reductions. However, despite the benefits of ERP, the interaction between supply chain stakeholders with varying and even contradictory security and privacy requirements could be challenging. In addition, incorporating a cross-domain access control might be hard because parties may require different access levels for information maintained outside their own ERP. In this work, we propose a blockchain architecture that acts as a service layer on top of existing ERP systems to achieve fine-grained intra- and cross-domain access control. A private blockchain is combined with four fully functional Smart Contracts to enable access control and trust management services, a data handler service, ensuring data integrity for both insiders and outsiders, and an audit mechanism.