Wolf, FlynnKuber, RaviAviv, Adam J.2020-10-132020-10-132017Wolf, Flynn; Kuber, Ravi; Aviv, Adam J.; Design of a Tactile Aid for Non-Observable Mobile Authentication to Address Observation Attacks; 33rd Annual Computer Security Applications Conference - ACSAC’17 (2017); https://userpages.umbc.edu/~rkuber/pubs/ACSAC17b.pdfhttp://hdl.handle.net/11603/19833In 33rd Annual Computer Security Applications Conference - ACSAC’17, Orlando, FL.Shoulder surfing remains a liability to the security of private data on mobile phones, even as secondary biometric authentication becomes more commonplace. Mobile users in public or shared spaces may therefore shield their screen from external viewers (and themselves) while unlocking. However, this coping strategy can lead to difficult and inaccurate entry. We are conducting a study characterizing this type of interaction and examining the efficacy of a tactile aid to support spatial orientation to the interface, with the aim of augmenting out-of-view PIN and graphical pattern unlocking. Preliminary findings suggest the tactile channel may support eyes-free unlocking, but requires careful integration. We also propose an initial set of qualitative codes addressing user strategies employed for out-of-view interaction.2 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Public Domain Mark 1.0This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Text