Understanding and Analyzing COVID-19-related Online Hate Propagation Through Hateful Memes Shared on Twitter. - Nishant Vishwamitra; Keyan Guo; Song Liao; Jaden Mu; Zheyuan Ma; Long Cheng 005; Ziming Zhao 001; Hongxin Hu (ASONAM, 2023)

An Investigation of Large Language Models for Real-World Hate Speech Detection. - Keyan Guo; Alexander Hu; Jaden Mu; Ziheng Shi; Ziming Zhao 001; Nishant Vishwamitra; Hongxin Hu (ICMLA, 2023)

Exploring Vulnerabilities in Voice Command Skills for Connected Vehicles. - Wenbo Ding 003; Song Liao; Keyan Guo; Fuqiang Zhang; Long Cheng 005; Ziming Zhao 001; Hongxin Hu (SmartSP, 2023)

Detecting Cyberbullying in Visual Content: A Large Vision-Language Model Approach. - Jaden Mu; David Cong; Helen Qin; Ishan Ajay; Keyan Guo; Nishant Vishwamitra; Hongxin Hu (ICMLA, 2024)

Moderating New Waves of Online Hate with Chain-of-Thought Reasoning in Large Language Models. - Nishant Vishwamitra; Keyan Guo; Farhan Tajwar Romit; Isabelle Ondracek; Long Cheng 005; Ziming Zhao 001; Hongxin Hu (SP, 2024)

Moderating Illicit Online Image Promotion for Unsafe User Generated Content Games Using Large Vision-Language Models. - Keyan Guo; Ayush Utkarsh; Wenbo Ding 003; Isabelle Ondracek; Ziming Zhao 001; Guo Freeman; Nishant Vishwamitra; Hongxin Hu (USENIX Security Symposium, 2024)

Moderating Embodied Cyber Threats Using Generative AI. - Keyan Guo; Guo Freeman; Hongxin Hu (CoRR, 2024)

AI-Cybersecurity Education Through Designing AI-based Cyberharassment Detection Lab. - Ebuka Okpala; Nishant Vishwamitra; Keyan Guo; Song Liao; Long Cheng 005; Hongxin Hu; Yongkai Wu; Xiaohong Yuan; Jeannette Wade; Sajad Khorsandroo (CoRR, 2024)

I know what you MEME! Understanding and Detecting Harmful Memes with Multimodal Large Language Models. - Yong Zhuang; Keyan Guo; Juan Wang 006; Yiheng Jing; Xiaoyang Xu 001; Wenzhe Yi; Mengda Yang; Bo Zhao 023; Hongxin Hu (NDSS, 2025)

JBShield: Defending Large Language Models from Jailbreak Attacks through Activated Concept Analysis and Manipulation. - Shenyi Zhang; Yuchen Zhai; Keyan Guo; Hongxin Hu; Shengnan Guo; Zheng Fang; Lingchen Zhao; Chao Shen 001; Cong Wang 001; Qian Wang 002 (CoRR, 2025)