ABSTRACT
Every federated information system requires means to store and share data securely. The i3-MARKET network is not an exception; hence, a wellthought solution that is secure, reliable, and usable by all entities in the i3-MARKET network is needed. The aim of data storage is to store common data in a federated network of data marketplaces. The common data shared between participating data marketplace instances may include identity information, shared semantic models, meta-information about datasets and offerings, semantic queries, sample data, smart contract templates and instances, crypto tokens, and payments. No single party should fully control the data storage system and there shall be no single point of failure. In order to fulfil the needs of the aforementioned data types, two separate storage solutions are used: the decentralized and the distributed one.
