@inproceedings {272308,
	author = {Yipeng Gao and Haichang Gao and Sainan luo and Yang Zi and Shudong Zhang and Wenjie Mao and Ping Wang and Yulong Shen and Jeff Yan},
	title = {Research on the Security of Visual Reasoning {CAPTCHA}},
	booktitle = {30th USENIX Security Symposium (USENIX Security 21)},
	year = {2021},
	isbn = {978-1-939133-24-3},
	pages = {3291--3308},
	url = {https://www.usenix.org/conference/usenixsecurity21/presentation/gao},
	publisher = {USENIX Association},
	month = aug
}
