ICT Systems Security and Privacy Protection 34th IFIP TC 11 International Conference, SEC 2019, Lisbon, Portugal, June 25-27, 2019, Proceedings - Dhillon, Gurpreet; Dhillon, Gurpreet; Karlsson, Fredrik; Karlsson, Fredrik; Hedström, Karin; Hedström, Karin; Zúquete, André; Zúquete, André (Springer International Publishing : Imprint: Springer, 2019)