Financial cryptography and data security FC 2018 International Workshops, BITCOIN, VOTING, and WTSC, Nieuwpoort, Curaçao, March 2, 2018 : revised selected papers - Zohar, Aviv; Eyal, Ittay; Teague, Vanessa; Clark, Jeremy; Bracciali, Andrea; Pintore, Federico; Sala, Massimiliano (Lecture notes in computer science, 2019)