ITrade: A Blockchain-based, Self-Sovereign, and Scalable Marketplace for IoT Data Streams

In recent years, the interest grew in the Internet- of-Things (IoT) and Blockchain (BC) integration for additional trust and decentralization. This opened potentials in various use cases, such as supply chain tracing, smart cities, and recently IoT data marketplaces. Therefore, this paper presents the de- sign, implementation, and evaluation of the BC-based IoT data trading platform “ITrade". ITrade proposes a highly scalable microservice-based architecture based on clouds. ITrade enables end-to-end data streaming from IoT devices toward data buyers. The Smart Contract (SC)-oriented design of ITrade enables decentralized management of autonomous and distributed IoT data trading. ITrade evaluations attest its scalability as a reliable peer-to-peer data transmission platform

A Blockchain-based Supply Chain Tracing for the Swiss Dairy Use Case

The heterogeneous nature of raw milk production, transportation, processing, transformation, and storage have been triggering concerns on the authenticity of dairy products. For the first time known, this work studied these concerns via interviews with consumers and producers of dairy products. Therefore, this paper introduces “NUTRIA” as a decentralized dairy product Supply Chain Tracing (SCT) system, designed and implemented based on real-world observations of the Swiss dairy supply chain and conducted in collaboration with dairy producers. Based on these studies and to overcome deficits of traditional and centralized SCT approaches, NUTRIA enables an automated SCT via a Blockchain-based decentralized application. NUTRIA materializes a trusted and transparent SCT, which empowers the dairy value chain. Furthermore, results of the real-world evaluations of deployed approaches within NUTRIA are covered, including social aspects and risks