Secure and Authorized Data Sharing among different IoT Network Domains using Beez blockchain

This paper explores the feasibility of a novel concept aimed at enabling secure and authorized data sharing among different IoT networks belonging to different organizations or owners (i.e., domains), each hosting a multitude of Internet of Things (IoT) sensors. These sensors are capable of collecting various data points, including temperature, liquid levels, and environmental conditions, which can be used to represent specific objects (e.g., temperature, cup of coffee). The challenge lies in facilitating data exchange between sensors and objects residing on different networks while ensuring security and authorization for a predetermined period. To address this challenge, we propose a solution that leverages blockchain technology. Specifically, the permission and content of data sent from sensors or objects are stored in dedicated nodes, referred to as storage nodes, within a blockchain network. The rules governing access to this data are managed by seed nodes, also within the blockchain network. This innovative approach enables the management of permissions for external clients, such as web applications, to access the content of data transmitted by sensors, all while adhering to predefined rules encoded as custom transactions within the blockchain system. A proof-of-concept prototype is presented that has been developed and tested in a preliminary test campaign. The first round of experiments shows promising results in terms of scalability, throughput, and latency.