I am currently a second third-year Ph.D. student in Computer Science at the City University of Hong Kong supervised by Prof.Cong Wang. Before that, I obtained B.Eng. from Wuhan University.
My research interests lies at the intersection of cybersecurity and AI. Particularly, I am focused on exploring how advanced AI techniques can be leveraged to enhance existing privacy measures, including large language models, searchable encryption, and blockchain.
🔥 News
- 2026.2: 🎉🎉 Our paper “OptiLeak: Efficient Prompt Reconstruction via Reinforcement Learning in Multi-tenant LLM Services” is now available on arXiv!
- 2025.1: 🎉🎉 Our paper “ALERT: Machine Learning-Enhanced Risk Estimation for Databases Supporting Encrypted Queries” was accepted by USENIX Security 25!
- 2024.12: 🎉🎉 Our paper “CALM: Curiosity-Driven Auditing for Large Language Models” was accepted by AAAI 25 as a poster!
- 2024.10: 🎉🎉 Our paper “Deploying Intrusion Detection on In-Vehicle Networks: Challenges and Opportunities” was accepted by IEEE Network Magazine!
📝 Selected Publications （* for co-first authors）
Preprint
- OptiLeak: Efficient Prompt Reconstruction via Reinforcement Learning in Multi-tenant LLM Services
Longxiang Wang, Xiang Zheng, Xuhao Zhang, Yao Zhang, Ye Wu, Cong Wang
arXiv preprint, 2026
Conference Papers
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ALERT: Machine Learning-Enhanced Risk Estimation for Databases Supporting Encrypted Queries
Longxiang Wang*, Lei Xu*, Yufei Chen, Ying Zou, Cong Wang
In Proc. of the 34th USENIX Security Symposium (USENIX SEC’25), 2025 -
CALM: Curiosity-Driven Auditing for Large Language Models
Xiang Zheng, Longxiang Wang, Yi Liu, Xingjun Ma, Chao Shen, Cong Wang
In Proc. of the 39th Annual AAAI Conference on Artificial Intelligence (AAAI’25), 2025
Journal Papers
- Deploying Intrusion Detection on In-Vehicle Networks: Challenges and Opportunities
Longxiang Wang, Qingchuan Zhao, Wei-Bin Lee, Cong Wang
IEEE Network Magazine, 2024
📖 Experiences and Educations
- 2023.09 - To Date, Ph.D. Student, suprvised by Prof.Cong Wang, Department of Computer Science, City University of Hong Kong.
- 2019.09 - 2023.07, Bachelor of Engineering, School of Electronic Information, Wuhan University.
💻 Services
Reviewer and External Reviewer
- IEEE TDSC, etc.
Teaching
- Teaching Assistant, CS6290 Privacy-enhancing Technologies, Sem B, 2024-2025
- Teaching Assistant, CS2310 Computer Programming, Sem A, 2024-2025
- Teaching Assistant, CS5491 Artificial Intellegence, Sem B, 2023-2024
- Teaching Assistant, CS2310 Computer Programming, Sem A, 2023-2024
- Teaching Assistant, Analogue Circuit II, Sem A, 2021-2022