Demjaha, A; Spring, JM; Becker, I; Parkin, S; Sasse, MA; (2018) Metaphors considered harmful? An exploratory study of the effectiveness of functional metaphors for end-to-end encryption. In: Acar, Y and Patil, S, (eds.) Proceedings of the NDSS Symposium 2018. Internet Society: San Diego, CA, USA. Green open access