( ^* indicates equal contribution)

Preprint

A Close Look into the Calibration of Pre-trained Language Models [paper]
Yangyi Chen^*, Lifan Yuan^*, Ganqu Cui, Zhiyuan Liu, Heng Ji
Bridge the Gap Between CV and NLP! A Gradient-based Textual Adversarial Attack Framework [paper]
Lifan Yuan^*, Yichi Zhang^*, Yangyi Chen, Wei Wei.

Conference Paper

Why Should Adversarial Perturbations be Imperceptible? Rethink the Research Paradigm in Adversarial NLP [paper]
Yangyi Chen^*, Hongcheng Gao^*, Ganqu Cui, Fanchao Qi, Longtao Huang, Zhiyuan Liu, Maosong Sun.
EMNLP
Textual Backdoor Attacks Can Be More Harmful via Two Simple Tricks [paper]
Yangyi Chen^*, Fanchao Qi^*, Hongcheng Gao, Zhiyuan Liu, Maosong Sun.
EMNLP (Short)
Moderate-fitting as a Natural Backdoor Defender for Pre-trained Language Models [paper]
Biru Zhu^*, Yujia Qin^*, Ganqu Cui, Yangyi Chen, Weilin Zhao, Chong Fu, Yangdong Deng, Zhiyuan Liu, Jingang Wang, Wei Wu, Maosong Sun, Ming Gu.
NeurIPS
A Unified Evaluation of Textual Backdoor Learning: Frameworks and Benchmarks [paper]
Ganqu Cui^*, Lifan Yuan^*, Bingxiang He, Yangyi Chen, Zhiyuan Liu, Maosong Sun.
NeurIPS (Dataset and Benchmark Track) (Spotlight)
Exploring the Universal Vulnerability of Prompt-based Learning Paradigm [paper]
Lei Xu, Yangyi Chen, Ganqu Cui, Hongcheng Gao, Zhiyuan Liu.
NAACL (Findings)

Mind the Style of Text! Adversarial and Backdoor Attacks Based on Text Style Transfer [paper]
Fanchao Qi^*, Yangyi Chen^*, Xurui Zhang, Mukai Li, Zhiyuan Liu, Maosong Sun.
EMNLP
Multi-granularity Textual Adversarial Attack with Behavior Cloning [paper]
Yangyi Chen^*, Jin Su^*, Wei Wei.
EMNLP
ONION: A Simple and Effective Defense Against Textual Backdoor Attacks [paper]
Fanchao Qi^*, Yangyi Chen^*, Mukai Li, Zhiyuan Liu, Maosong Sun.
EMNLP (Short)
Hidden Killer: Invisible Textual Backdoor Attacks with Syntactic Trigger [paper]
Fanchao Qi^*, Mukai Li^*, Yangyi Chen^*, Zhengyan Zhang, Zhiyuan Liu, Yasheng Wang, Maosong Sun.
ACL
Automatic Construction of Sememe Knowledge Bases via Dictionaries [paper]
Fanchao Qi, Yangyi Chen, Fengyu Wang, Zhiyuan Liu, Xiao Chen, Maosong Sun.
ACL (Findings)