Hidden Killer: Invisible Textual Backdoor Attacks with Syntactic Trigger Fanchao Qi author Mukai Li author Yangyi Chen author Zhengyan Zhang author Zhiyuan Liu author Yasheng Wang author Maosong Sun author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication qi-etal-2021-hidden 10.18653/v1/2021.acl-long.37 https://aclanthology.org/2021.acl-long.37/ 2021-08 443 453