WebSTAMP: a Web Application for STPA & STPA-Sec Fellipe G.R. Souza, Daniel P. Pereira, Rodrigo M. Pagliares, Simin Nadjm-Tehrani and Celso M. Hirata MATEC Web Conf., 273 (2019) 02010 Published online: 22 February 2019 DOI: 10.1051/matecconf/201927302010