Detecting and resolving privacy conflicts for collaborative data sharing in online social networks. - Hongxin Hu; Gail-Joon Ahn; Jan Jorgensen (ACSAC, 2011)

Enabling Collaborative data sharing in Google+. - Hongxin Hu; Gail-Joon Ahn; Jan Jorgensen (GLOBECOM, 2012)

Multiparty Access Control for Online Social Networks: Model and Mechanisms. - Hongxin Hu; Gail-Joon Ahn; Jan Jorgensen (IEEE Trans. Knowl. Data Eng., 2013)