Kirlappos, I; Sasse, MA; (2014) What usable security really means: Trusting and engaging users. In: Tryfonas, T and Askoxylakis, I, (eds.) Human Aspects of Information Security, Privacy, and Trust: Second International Conference, HAS 2014, Held as Part of HCI International 2014, Heraklion, Crete, Greece, June 22-27, 2014. Proceedings. (pp. 69 - 78). Springer International Publishing: Switzerland.