Trouble over-the-air: An analysis of FOTA apps in the android ecosystem - Blazquez Gonzalez, Eduardo; Pastrana Portillo, Sergio; Feal, Alvaro; Gamba, Julien; Kotzias, Platon; Vallina Rodriguez, Narseo; Tapiador, Juan (2021 IEEE Symposium on Security and Privacy (SP), 2021)