Aztarna, a footprinting tool for robots. - Victor Mayoral Vilches; Gorka Olalde Mendia; Xabier Perez Baskaran; Alejandro Hernández Cordero; Lander Usategui San Juan; Endika Gil-Uriarte; Odei Olalde Saez de Urabain; Laura Alzola Kirschgens (CoRR, 2018)