Self-sovereign, verifiable, ubiquitous and privacy preserving public entity documents through the use of blockchain technology

Nowadays, citizens tend to use digital services for their interaction with public entities and third party entities. In such cases, they are usually required to present personal public documents, to prove the validity of personal information. Each citizen shares all personal data included in such documents with multiple entities, in order to prove the validity of a subset of those. On top of that, such systems run the risk of documents being forged. In fact, citizens do not have complete control over their personal data management. In this work, a decentralized system for creating and handling documents is presented. We propose a blockchain-based system that enables citizens to actively take part into the creation and management of such documents. Through a granular access control mechanism for the fields of the document, privacy leakage for citizens is minimized. The system enables the seamless interaction between citizens and entities while ensuring privacy and integrity of citizen’s personal data.