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Furthermore, users usually are not willing to share private data such as their visited locations, the text messages they wrote, or the photo they took with a third party. On the other hand, users appreciate services that work based on their behaviors and preferences. In order to address these issues, Federated Learning (FL) has been recently proposed as a means to build ML models based on private datasets distributed over a large number of clients, while preventing data leakage. A federation of users is asked to train a same global model on their private data, while a central coordinating server receives locally computed updates by clients and aggregate them to obtain a better global model, without the need to use clients\u2019 actual data. In this work, we extend the FL approach by pushing forward the state-of-the-art approaches in the aggregation step of FL, which we deem crucial for building a high-quality global model. Specifically, we propose an approach that takes into account a suite of client-specific criteria that constitute the basis for assigning a score to each client based on a priority of criteria defined by the service provider. Extensive experiments on two publicly available datasets indicate the merits of the proposed approach compared to standard FL baseline.<\/jats:p>","DOI":"10.3233\/ia-200054","type":"journal-article","created":{"date-parts":[[2021,1,12]],"date-time":"2021-01-12T22:55:07Z","timestamp":1610492107000},"page":"183-200","source":"Crossref","is-referenced-by-count":14,"title":["Prioritized multi-criteria federated learning"],"prefix":"10.1177","volume":"14","author":[{"given":"Vito Walter","family":"Anelli","sequence":"first","affiliation":[{"name":"Dipartimento di Ingegneria Elettrica e dell\u2019Informazione, Politecnico di Bari, Bari, Italy"}]},{"given":"Yashar","family":"Deldjoo","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria Elettrica e dell\u2019Informazione, Politecnico di Bari, Bari, Italy"}]},{"given":"Tommaso","family":"Di Noia","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria Elettrica e dell\u2019Informazione, Politecnico di Bari, Bari, Italy"}]},{"given":"Antonio","family":"Ferrara","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria Elettrica e dell\u2019Informazione, Politecnico di Bari, Bari, Italy"}]}],"member":"179","reference":[{"issue":"5","key":"10.3233\/IA-200054_ref1","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1109\/MITP.2012.93","article-title":"BYOD: security and privacy considerations","volume":"14","author":"Miller","year":"2012","journal-title":"IT Professional"},{"key":"10.3233\/IA-200054_ref2","unstructured":"Deldjoo Y. , Noia T.D. , Merra F.A. , Adversarial machine learning in recommender systems: State of the art and challenges. 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