Textual Backdoor Attacks Can Be More Harmful via Two Simple Tricks Yangyi Chen author Fanchao Qi author Hongcheng Gao author Zhiyuan Liu author Maosong Sun author 2022-12 text Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication chen-etal-2022-textual 10.18653/v1/2022.emnlp-main.770 https://aclanthology.org/2022.emnlp-main.770/ 2022-12 11215 11221