USEC 2015 Workshop on Usable Security, San Diego, California, USA, February 8, 2015. (Submissions due 24 November 2014) The Workshop on Usable Security invites submissions on all aspects of human factors and usability in the context of security and privacy. USEC 2015 aims to bring together researchers already engaged in this interdisciplinary effort with other computer science researchers in areas such as visualization, artificial intelligence and theoretical computer science as well as researchers from other domains such as economics or psychology. We particularly encourage collaborative research from authors in multiple fields. Topics include, but are not limited to: - Evaluation of usability issues of existing security and privacy models or technology - Design and evaluation of new security and privacy models or technology - Impact of organizational policy or procurement decisions - Lessons learned from designing, deploying, managing or evaluating security and privacy technologies - Foundations of usable security and privacy - Methodology for usable security and privacy research - Ethical, psychological, sociological and economic aspects of security and privacy technologies USEC solicits short and full research papers. For more information, please see http://www.internetsociety.org/events/ndss-symposium-2015/usec-workshop-call-papers .