Establish trust for sharing data for smart territories thanks to consents notarized by blockchain

International audienceMany territories are implementing development strategies strongly rooted in ambitions in terms of digital innovation. These strategies aim not only regional planning, but also economic development and people’s quality of life. This refers to the concept of smart territories. To achieve their objectives, smart territories generally use citizens’ data to offer them services and support them in better individualized decision-making. However, a major problem arises in data management, as it is necessary to have the consent of users to access and use data.In this article, we propose a generic blockchain-based model for consent-based data sharing in the context of smart territories, while putting users at the center of control of their data. We take advantage of ADA-M (Automatable Discovery and Access Matrix), a matrix that provides a standardized way to unambiguously represent conditions related to discovery and access to data. We couple the use of ADA-M with a blockchain anchor system, which helps secure consent management for data access. This helps to develop an environment of digital trust for sharing data between users. Then, through a digital token, we offer a system of rewards for users in cases where their data is used for commercial purposes