CO-DEFEND: Continuous decentralized federated learning for secure DoH-based threat detection - Cajaraville Aboy, Diego; Moure Garrido, Marta; Beis Penedo, Carlos; Garcia Rubio, Carlos; Diaz Redondo, Rebeca P.; Campo Vazquez, Maria Celeste; Fernandez Vilas, Ana; Fernandez Veiga, Manuel (Computer Networks, 2026)