Keyan Guo

According to our database, Keyan Guo authored at least 15 papers between 2023 and 2026.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2026

AgentSentry: Mitigating Indirect Prompt Injection in LLM Agents via Temporal Causal Diagnostics and Context Purification.

Tian Zhang, Yiwei Xu, Juan Wang, Keyan Guo, Xiaoyang Xu, Bowen Xiao, Quanlong Guan, Jinlin Fan, Jiawei Liu, Zhiquan Liu, Hongxin Hu

CoRR, February, 2026

Beyond Age-Based Restrictions: Rethinking Children's Online Safety Through Comparing Parent-Child Perspectives of Risks in User-Generated Content Games.

Ruchi Panchanadikar, Yang Hu, Keyan Guo, Amelia L. Hall, Hongxin Hu, Nishant Vishwamitra, Guo Freeman

Proceedings of the 2026 CHI Conference on Human Factors in Computing Systems, 2026

2025

Fortifying LLM-Based Code Generation with Graph-Based Reasoning on Secure Coding Practices.

Rupam Patir, Keyan Guo, Haipeng Cai, Hongxin Hu

CoRR, October, 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, Cong Wang, Qian Wang

Proceedings of the 34th USENIX Security Symposium, 2025

I know what you MEME! Understanding and Detecting Harmful Memes with Multimodal Large Language Models.

Yong Zhuang, Keyan Guo, Juan Wang, Yiheng Jing, Xiaoyang Xu, Wenzhe Yi, Mengda Yang, Bo Zhao, Hongxin Hu

Proceedings of the 32nd Annual Network and Distributed System Security Symposium, 2025

Toward Unified Moderation of Cyberbullying Across Social Media and Video Games.

David Cong, Keyan Guo, Hongxin Hu

Proceedings of the International Conference on Machine Learning and Applications, 2025

HVGuard: Utilizing Multimodal Large Language Models for Hateful Video Detection.

Yiheng Jing, Mingming Zhang, Yong Zhuang, Jiacheng Guo, Juan Wang, Xiaoyang Xu, Wenzhe Yi, Keyan Guo, Hongxin Hu

Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing, 2025

2024

AI-Cybersecurity Education Through Designing AI-based Cyberharassment Detection Lab.

Ebuka Okpala, Nishant Vishwamitra, Keyan Guo, Song Liao, Long Cheng, Hongxin Hu, Yongkai Wu, Xiaohong Yuan, Jeannette Wade, Sajad Khorsandroo

CoRR, 2024

Moderating Embodied Cyber Threats Using Generative AI.

Keyan Guo, Guo Freeman, Hongxin Hu

CoRR, 2024

Moderating Illicit Online Image Promotion for Unsafe User Generated Content Games Using Large Vision-Language Models.

Keyan Guo, Ayush Utkarsh, Wenbo Ding, Isabelle Ondracek, Ziming Zhao, Guo Freeman, Nishant Vishwamitra, Hongxin Hu

Proceedings of the 33rd USENIX Security Symposium, 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, Ziming Zhao, Hongxin Hu

Proceedings of the IEEE Symposium on Security and Privacy, 2024

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

Proceedings of the International Conference on Machine Learning and Applications, 2024

2023

Exploring Vulnerabilities in Voice Command Skills for Connected Vehicles.

Wenbo Ding, Song Liao, Keyan Guo, Fuqiang Zhang, Long Cheng, Ziming Zhao, Hongxin Hu

Proceedings of the Security and Privacy in Cyber-Physical Systems and Smart Vehicles, 2023

An Investigation of Large Language Models for Real-World Hate Speech Detection.

Keyan Guo, Alexander Hu, Jaden Mu, Ziheng Shi, Ziming Zhao, Nishant Vishwamitra, Hongxin Hu

Proceedings of the International Conference on Machine Learning and Applications, 2023

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, Ziming Zhao, Hongxin Hu

Proceedings of the International Conference on Advances in Social Networks Analysis and Mining, 2023