Speaker: Pan Shi Title: Collective Privacy for a Networked World: Bridging Theory into Design Abstract The feature of "See Friendship" is a recently released feature on Facebook, which aggregates two friends' interaction information into one single page. In this paper, we conducted a series of studies to examine privacy concerns surrounding this feature. By applying a user-centered design approach, we investigated users' privacy needs and expectations through a content analysis of users' feedback on official Facebook Blog pages as well as a user study. We extracted design heuristics from these conceptual and empirical investigations. We then designed three alternative privacy control options based on our findings, and evaluated through a qualitative study. Our results highlight specific tensions between OSNs users' social needs and relational privacy which highly involved peers' information privacy. Furthermore, this study provides both conceptual and empirical insights in terms of design recommendations to address tensions in friendship information management.