Electronic Voting 4th International Joint Conference, E-Vote-ID 2019, Bregenz, Austria, October 1-4, 2019, Proceedings - Krimmer, Robert; Krimmer, Robert; Volkamer, Melanie; Volkamer, Melanie; Cortier, Veronique; Cortier, Veronique; Beckert, Bernhard; Beckert, Bernhard; Küsters, Ralf; Küsters, Ralf; Serdült, Uwe; Serdült, Uwe; et al. (Springer International Publishing : Imprint: Springer, 2019)