@inproceedings {180376, author = {Ziming Zhao and Gail-Joon Ahn and Jeong-Jin Seo and Hongxin Hu}, title = {On the Security of Picture Gesture Authentication}, booktitle = {22nd USENIX Security Symposium (USENIX Security 13)}, year = {2013}, isbn = {978-1-931971-03-4}, address = {Washington, D.C.}, pages = {383--398}, url = {https://www.usenix.org/conference/usenixsecurity13/technical-sessions/presentation/zhao}, publisher = {USENIX Association}, month = aug }