Improving the Security and QoE in Mobile Devices through an Intelligent and Adaptive Continuous Authentication System. - José María Jorquera Valero; Pedro Miguel Sánchez Sánchez; Lorenzo Fernández Maimó; Alberto Huertas Celdrán; Marcos Arjona Fernández; Sergio De Los Santos Vílchez; Gregorio Martínez Pérez (Sensors, 2018)