@inproceedings{sun2018understanding, title = {{Understanding and Predicting Private Interactions in Underground Forums}}, author = {Sun, Zhibo and Rubio-Medrano, Carlos E. and Zhao, Ziming and Bao, Tiffany and Doup{\'e}, Adam and Ahn, Gail-Joon}, booktitle = {Proceedings of the Ninth ACM Conference on Data and Application Security and Privacy (CODASPY)}, year = {2019}, organization={ACM} }