Distributed Authentication in a Multi-Zone Direct Acyclic Graph Blockchain for IoT EnvironmentSalaheddine Kably, Tajeddine Benbarrad, Nabih Alaoui, Antonio GuerreroGonzálezoz and Mounir AriouaITM Web Conf., 52 (2023) 01001DOI: https://doi.org/10.1051/itmconf/20235201001