@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 }