Financial Cryptography and Data Security FC 2017 International Workshops, WAHC, BITCOIN, VOTING, WTSC, and TA, Sliema, Malta, April 7, 2017, Revised Selected Papers - Brenner, Michael; Rohloff, Kurt; Bonneau, Joseph; Miller, Andrew; Ryan, Peter Y.A; Teague, Vanessa; Bracciali, Andrea; Sala, Massimiliano; Pintore, Federico; Jakobsson, Markus (Springer International Publishing : Imprint: Springer, 2017)