Human-Computer Interaction (HCI) research has been focusing on properties such as usability, accessibility, inclusive design, user experience. As new security risks are emerging with the continuous increase of Internet interconnections and the development of the Internet of Things, more recently security, trust and resilience have also become important for the development of interactive systems. Since users have been identified as one of the major security weaknesses in today’s technologies, HCI becomes a fundamental pillar for designing more secure (but still usable) systems. However, interactive system properties might overlap and sometimes create conflicts in user-centered development processes. For example, security could reduce system usability by placing a burden on users when they have to deal with passwords. The HCI research has provided several tools and techniques that can support designers in making decisions, but there are no “cookbooks”. This workshop promotes sharing of experiences in managing and resolving conflicts of multiple interactive system properties within the context of a user-centered design process. We are concerned by theories, methods and approaches for dealing with interactive system properties, managing potential conflicts and trade-offs. This workshop is organized by the IFIP WG 13.2 on Methodology for User-Centered System Design and the IFIP WG 13.5 on Human Error, Resilience, Reliability and Safety in System Development.