Enabling Identity for the IoT-as-a-Service Business Model De Diego, Santiago Regueiro, Cristina Macía Fernández, Gabriel IoT As-a-service IoTaaS Identity management SSI This work was supported in part by the Basque Country Government through the Collaborative Research Grants Program in Strategic Areas (ELKARTEK) Program by the Project TRUSTIND under Grant KK-2020/00054 and in part by the Spanish Government-Ministry of Science and Innovation through the Project AI4ES-2021 under Grant CER-20211030 and through the Project SICRAC under Grant PID2020-114495RB-I00. The IoT-as-a-Service (IoTaaS) business model has already been identi ed by some people from both industry and academia, but has not been formally de ned. IoTaaS offers IoT devices on demand, with considerable cost savings and resource optimization. In addition, it enables different applications to reuse the existing devices. However, this business model is associated with different technological challenges that need to be addressed, one of which is the identity problem. Focusing on this, self-sovereign identity (SSI) schemes have proven to provide better privacy and scalability than traditional identity paradigms, which is especially important in the IoT owing to its characteristics. In this paper, we formally analyze an IoTaaS business model, identifying and detailing its main technological challenges. In addition, we tackle the identity problem of this business model and propose an SSI-based identity management system, which is compliant with the existing standards from the W3C, and include a performance evaluation. 2022-01-10T08:30:59Z 2022-01-10T08:30:59Z 2021-11-25 info:eu-repo/semantics/article S. de Diego, C. Regueiro and G. Maciá-Fernández, "Enabling Identity for the IoT-as-a-Service Business Model," in IEEE Access, vol. 9, pp. 159965-159975, 2021, doi: [10.1109/ACCESS.2021.3131012] http://hdl.handle.net/10481/72264 10.1109/ACCESS.2021.3131012 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España IEEE