Threat Modelling of IoT Systems Using Distributed Ledger Technologies and IOTA - Damianou, Amalia; Khan, M. Amir; Marios Angelopoulos, Constantinos; Katos, Vasilios (2021 17th International Conference on Distributed Computing in Sensor Systems (DCOSS), Distributed Computing in Sensor Systems (DCOSS), 2021 17th International Conference on, DCOSS, 2021)