I am a 4th year Ph.D. candidate of SAND Lab, Department of Computer Science, University of California, Santa Barbara. I am co-advised by Prof. Ben Zhao and Prof. Heather Zheng.

My research interests are centered on Online Social Networks(OSNs), Graph Analysis and Modeling. My work aims at generating a better understanding of large scale data, e.g. network traffic and large graphs like online social networks. Most of my work is measurement-driven and modeling based, with an emphasis on studying both static and dynamic graph properties.


2015 August: Our paper Towards Graph Watermarks accepted by COSN'15

2014 December: PH.D. Qualification Talk Graph Privacy in Major Area Exam of UCSB [Talk Slides]


Xiaohan Zhao,Qingyun Liu,Haitao Zheng and Ben Y.Zhao, "Towards Graph Watermarks",Proc. of the ACM Conference on Online Social Networks (COSN'15), Stanford University, California, USA, November 2015.

[PDF], [Talk Slides], [Extended Version]

Qingyun Liu,Xiaohan Zhao, Walter Willinger, Xiao Wang, Ben Y.Zhao and Haitao Zheng, "Self-similarity in Social Network Dynamics",submitted, currently under review

Qingyun Liu,Shiliang Tang, Xinyi Zhang, Xiaohan Zhao, Ben Y.Zhao and Haitao Zheng, "Network Growth and Link Prediction Through an Empirical Lens",submitted, currently under review

Junjie Yao, Bin Cui, Zijun Xue and Qingyun Liu, "Provenance-based Indexing Support in Micro-blog Patlforms",,Proc. of the IEEE 28th International Conference on Date Engeneering (ICDE'12), Arlington, VA, USA, April 2012. [PDF]