2023 USENIX Two-in-One: A Model Hijacking Attack Against Text Generation Models Wai Man Si, Michael Backes, Yang Zhang, and 1 more author 2023 PDF 2022 CCS Why So Toxic?: Measuring and Triggering Toxic Behavior in Open-Domain Chatbots Wai Man Si, Michael Backes, Jeremy Blackburn, and 4 more authors In , 2022 PDF 2021 SIGDAL Telling Stories through Multi-User Dialogue by Modeling Character Relations Wai Man Si, Prithviraj Ammanabrolu, and Mark O. Riedl In , 2021 PDF 2019 PRICAI Boosting Variational Generative Model via Condition Enhancing and Lexical-Editing Zhengwei Tao, Wai Si, Juntao Li, and 2 more authors In , 2019