Multiuser Privacy

Privacy is not just about what an individual user discloses about herself, it also involves what her friends may disclose about her. Multiuser privacy (also called Multiparty Privacy) is concerned with information pertaining to several individuals and the conflicts that arise when the privacy preferences of these individuals differ. One typical example is a group photo, what one person does with that photo may have privacy implications for the others in the group. This problem happens across many modern technologies, including Social Media, Cloud Computing, Internet of Things / Smart Homes, etc.

We have already made several contributions to multiuser privacy, from generating empirical evidence needed to understand the problem to AI-based methods to resolve multiuser privacy conflicts that we tested with users with successful results. For a recent review of the field see pub (*) below.

Related Projects

• Resolving Multiparty Privacy Conflicts - RePriCo

Selected Publications

• Eman Alhelali, Kopo Ramokapane, and Jose Such. Multiuser Privacy and Security Conflicts in the Cloud. In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI), pp. 205:1–205:16, 2023.       
• Francesca Mosca and Jose Such. ELVIRA: an Explainable Agent for Value and Utility-driven Multiuser Privacy. In International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS), pp. 916–924, 2021.       
• (*) Jose Such and N Criado. Multiparty Privacy in Social Media. Communications of the ACM (CACM), 61(8):74–81, 2018.       
• Jose Such, J Porter, S Preibusch, and A Joinson. Photo Privacy Conflicts in Social Media: A Large-scale Empirical Study. In Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI), pp. 3821–3832, 2017.       
• Ricard Fogues, Pradeep Murukannaiah, Jose Such, and Munindar Singh. Sharing policies in multiuser privacy scenarios: Incorporating Context, Preferences, and Arguments in Decision Making. ACM Trans on Computer-Human Interaction (TOCHI), 24(1):5, 2017.       
• Jose Such and Natalia Criado. Resolving multi-party privacy conflicts in social media. IEEE Transactions on Knowledge and Data Engineering (TKDE), 28(7):1851–1863, 2016.       
• Jose Such and Michael Rovatsos. Privacy policy negotiation in social media. ACM Transactions on Autonomous and Adaptive Systems (TAAS), 11(1):4, 2016.       

See more publications on this topic here