@inproceedings {236272, author = {Yeonjoon Lee and Xueqiang Wang and Kwangwuk Lee and Xiaojing Liao and XiaoFeng Wang and Tongxin Li and Xianghang Mi}, title = {Understanding {iOS-based} Crowdturfing Through Hidden {UI} Analysis}, booktitle = {28th USENIX Security Symposium (USENIX Security 19)}, year = {2019}, isbn = {978-1-939133-06-9}, address = {Santa Clara, CA}, pages = {765--781}, url = {https://www.usenix.org/conference/usenixsecurity19/presentation/lee}, publisher = {USENIX Association}, month = aug } @inproceedings {203632, author = {Xiaolong Bai and Zhe Zhou and XiaoFeng Wang and Zhou Li and Xianghang Mi and Nan Zhang and Tongxin Li and Shi-Min Hu and Kehuan Zhang}, title = {Picking Up My Tab: Understanding and Mitigating Synchronized Token Lifting and Spending in Mobile Payment}, booktitle = {26th USENIX Security Symposium (USENIX Security 17)}, year = {2017}, isbn = {978-1-931971-40-9}, address = {Vancouver, BC}, pages = {593--608}, url = {https://www.usenix.org/conference/usenixsecurity17/technical-sessions/presentation/bai}, publisher = {USENIX Association}, month = aug }