Trust, Privacy and Security in Digital Business 16th International Conference, TrustBus 2019, Linz, Austria, August 26-29, 2019, Proceedings - Gritzalis, Stefanos; Gritzalis, Stefanos; Weippl, Edgar R.; Weippl, Edgar R.; Katsikas, Sokratis K.; Katsikas, Sokratis K.; Anderst-Kotsis, Gabriele; Anderst-Kotsis, Gabriele; Tjoa, A Min; Tjoa, A Min; Khalil, Ismail; Khalil, Ismail (Springer International Publishing : Imprint: Springer, 2019)