Internet Science 4th International Conference, INSCI 2017, Thessaloniki, Greece, November 22-24, 2017, Proceedings - Kompatsiaris, Ioannis; Cave, Jonathan; Satsiou, Anna; Carle, Georg; Passani, Antonella; Kontopoulos, Efstratios; Diplaris, Sotiris; McMillan, Donald (Springer International Publishing : Imprint: Springer, 2017)