Qian Lou

Qian Lou 

Director of A³ Lab at UCF and Assistant Professor
Computer Science, University of Central Florida
Email: qian.lou@ucf.edu, Office: HS2 234

Publications | Research Group | Teaching | Google Scholar | Patents

Qian Lou directs the A³ Lab at UCF and is a tenure-track assistant professor in Computer Science. He has published 50+ papers in top ML/AI/NLP/CV venues and leading security/systems venues. His research has been supported by major federal programs (e.g., NSF and DoD). He mentors multiple productive and collaborative Ph.D. students and supports student internships and career development. He teaches graduate-level courses and contributes sustained professional service, including area chair roles for major ML venues (e.g., NeurIPS, ICLR, ACL) and TPC/PC service for top security/systems venues (e.g., CCS, NDSS, DAC, ISCA).

A³ Lab — Evaluation, Design, and Applications for Agentic AI. Our mission is to build Intelligent, efficient, and safe Agentic AI—AI systems that can plan, use tools, and act reliably under real-world constraints. We start from real applications and measurable evidence: datasets, evaluation workflows, and benchmarks that expose practical failure modes and bottlenecks. These takeaways directly motivate and guide our designs across model, I/O, and system layers.

News

01 / 2026[Paper]One paper has been accepted by ICLR 2026.
12 / 2025[Paper]One paper has been accepted by ASPLOS 2026.
11 / 2025[Paper]One paper has been accepted by PETS 2026.
10 / 2025[Paper]One paper has been accepted by NDSS 2026.
09 / 2025[Paper][Mentoring]Our federated learning with encrypted aggregation (<2x overhead) is accepted by NeurIPS 2025.
08 / 2025[Grant]Our privacy-preserving data synthesis based on private computing is funded by NSF SaTC Crosscutting.
08 / 2025[Paper][Mentoring]Two papers are accepted by EMNLP 2026.
04 / 2025[Grant]Our LLM Application Security Testing (LAST) Framework is funded by the DoD Pathfinder Program.
03 / 2025[Grant]Our system support for secure computing is funded by NSF CISE Core.
02 / 2025[Paper]One paper is accepted by DAC 2025.
01 / 2025[Paper]One paper is accepted by ICLR 2025.
10 / 2024[Paper]One paper is accepted by NeurIPS 2024.
09 / 2024[Paper]Two papers about Jailbreaking and fairness backdoors are accepted by EMNLP 2024.
09 / 2024[Paper]DataSeal is accepted by IEEE S&P 2025.
07 / 2024[Paper]One paper is accepted by MICRO 2024.
07 / 2024[Paper]WBP is accepted by ECCV 2024.
07 / 2024[Paper]SSL-Cleanse is accepted by ECCV 2024.
06 / 2024[Paper]BoostCom is accepted by PACT 2024.
05 / 2024[Mentoring]Congratulations to Jiaqi Xue and Yancheng Zhang, who started their internships at Samsung Research America.
05 / 2024[Paper]CR-UTP is accepted by ACL 2024.
03 / 2024[Paper]TrojFSP is accepted by NAACL 2024 (Oral in the main conference).
09 / 2023[Paper]TrojLLM is accepted by NeurIPS 2023.
02 / 2023[Paper]TrojViT is accepted by CVPR 2023.
02 / 2023[Paper]Primer is accepted by DAC 2023.
01 / 2023[Paper]TrojText is accepted by ICLR 2023.
10 / 2022[Paper]Weighted value decomposition on language model is accepted by EMNLP 2022.
03 / 2022[Paper]LITE-MDETR is accepted by CVPR 2022.
02 / 2022[Paper]MATCHA is accepted by DAC 2022.
01 / 2022[Paper]Language Model Compression is accepted by ICLR 2022.
01 / 2022[Paper]DictFormer is accepted by ICLR 2022.
08 / 2021[Paper]CryptoGRU is accepted by EMNLP 2021.
05 / 2021[Paper]HEMET is accepted by ICML 2021.
05 / 2021[Research]Qian received a Luddy Outstanding Research Award.
09 / 2020[Paper]Three papers were accepted by NeurIPS 2020.

Research Group

We are a collaborative team.

  • Prospective Students: We are recruiting Ph.D. students and a postdoctoral researcher to join the A³ Lab at UCF. Interested applicants should email qian.lou@ucf.edu with the subject line: “2026 Prospective Member – A³ Lab at UCF”. Please include your CV and a brief summary of your research experience, interests, and notable accomplishments. For application details, please apply through the CS department and include my name as a possible advisor in your application.

    Have questions? Check out my answers to the PhD Advisor Guide.

Recent Community Services

Teaching

Publications

Publications at UCF

* indicates students and staff under my supervision

[ICLR 26] TFHE-Coder: Evaluating LLM Agents for secure Fully Homomorphic Encryption Code Generation
Mayank Kumar*, Jiaqi Xue*, Mengxin Zheng, Qian Lou
International Conference on Learning Representations (ICLR), Rio de Janeiro, Brazil, 2026

[PoPETs 26] SoK: Can Fully Homomorphic Encryption Support General AI Computation? A Functional and Cost Analysis
Jiaqi Xue*, Xin Xin, Wei Zhang, Mengxin Zheng, Qianqian Song, Minxuan Zhou, Yushun Dong, Dongjie Wang, Xun Chen, Jiafeng Xie, Liqiang Wang, David Mohaisen, Hongyi Wu, Qian Lou
Proceedings on Privacy Enhancing Technologies (PoPETs), Calgary, Canada, 2026

[SaTML 26] RobPI: Robust Private Inference against Malicious Client
Jiaqi Xue*, Mengxin Zheng, Qian Lou
IEEE Conference on Secure and Trustworthy Machine Learning (SaTML), Munich, Germany, 2026

[NeurIPS 25] DictPFL: Efficient and Private Federated Learning on Encrypted Gradients
Jiaqi Xue*, Mayank Kumar*, Yuzhang Shang, Shangqian Gao, Rui Ning, Mengxin Zheng, Xiaoqian Jiang, Qian Lou
Annual Conference on Neural Information Processing Systems (NeurIPS), San Diego, United States, 2025

[EMNLP 25] Evaluating the Robustness and Accuracy of Text Watermarking Under Real-World Cross-Lingual Manipulations
Mansour Al Ghanim*, Jiaqi Xue*, Rochana Prih Hastuti*, Mengxin Zheng, Yan Solihin, Qian Lou
Empirical Methods in Natural Language Processing (EMNLP), Suzhou, China, 2025

[EMNLP 25] Factuality Beyond Coherence: Evaluating LLM Watermarking Methods for Medical Texts
Rochana Prih Hastuti*, Rian Adam Rajagede, Mansour Al Ghanim*, Mengxin Zheng, Qian Lou
Empirical Methods in Natural Language Processing (EMNLP), Suzhou, China, 2025

[DAC 25] zkVC: Fast Zero-Knowledge Proof for Private and Verifiable Computing
Yancheng Zhang*, Mengxin Zheng, Xun Chen, Jingtong Hu, Weidong Shi, Lei Ju, Yan Solihin, Qian Lou
The Design Automation Conference (DAC), 2025
[Paper (PDF)] [Code]

[ICLR 25] CipherPrune: Efficient and Scalable Private Transformer Inference
Yancheng Zhang*, Jiaqi Xue*, Mengxin Zheng, Mimi Xie, Mingzhe Zhang, Lei Jiang, Qian Lou
The Thirteenth International Conference on Learning Representations
[Paper (PDF)] [Code]

[S&P 25] DataSeal: Ensuring the Verifiability of Private Computation on Encrypted Data
Muhammad Husni Santriaji*, Jiaqi Xue*, Yancheng Zhang*, Qian Lou, Yan Solihin
2025 IEEE Symposium on Security and Privacy (SP)
[Paper (PDF)]

[NeurIPS 24] HEPrune: Fast Private Training of Deep Neural Networks With Encrypted Data Pruning
Yancheng Zhang*, Mengxin Zheng, Yuzhang Shang, Xun Chen, Qian Lou
The Thirty-eighth Annual Conference on Neural Information Processing Systems
[Paper (PDF)] [Code]

[EMNLP 24] BadFair: Backdoored Fairness Attacks with Group-conditioned Triggers
Jiaqi Xue*, Qian Lou, Mengxin Zheng
Conference on Empirical Methods in Natural Language Processing (EMNLP), 2024
[Paper (PDF)]

[EMNLP 24] Jailbreaking LLMs with Arabic Transliteration and Arabizi
Mansour Al Ghanim*, Saleh Almohaimeed, Mengxin Zheng, Yan Solihin, Qian Lou
Conference on Empirical Methods in Natural Language Processing (EMNLP), 2024
[Paper (PDF)] [Code]

[MICRO 24] Trinity: A General Purpose FHE Accelerator
Xianglong Deng, Shengyu Fan, Zhicheng Hu, Zhuoyu Tian, Zihao Yang, Jiangrui Yu, Dingyuan Cao, Dan Meng, Rui Hou, Meng Li, Qian Lou, Mingzhe Zhang
IEEE/ACM International Symposium on Microarchitecture (MICRO), 2024
[Paper (PDF)]

[CCS-WAHC 24] HEBridge: Connecting Arithmetic and Logic Operations in FV-style HE Schemes
Yancheng Zhang*, Xun Chen, Qian Lou
WAHC'24: Proceedings of the 12th Workshop on Encrypted Computing & Applied Homomorphic Cryptography
[Paper (PDF)]

[CCS-LAMPS 24] TrojFair: Trojan Fairness Attacks
Jiaqi Xue*, Mengxin Zheng, Yi Sheng, Lei Yang, Qian Lou, Lei Jiang
1st ACM Workshop on Large AI Systems and Models with Privacy and Safety Analysis (LAMPS), 2024
[Paper (PDF)]

[CCS-LAMPS 24] CryptoTrain: Fast Secure Training on Encrypted Data
Jiaqi Xue*, Yancheng Zhang*, Yanshan Wang, Xueqiang Wang, Hao Zheng, Qian Lou
1st ACM Workshop on Large AI Systems and Models with Privacy and Safety Analysis (LAMPS), 2024
[Paper (PDF)]

[ACL 24] CR-UTP: Certified Robustness against Universal Text Perturbations on Large Language Models
Qian Lou, Xin Liang*, Jiaqi Xue*, Yancheng Zhang*, Rui Xie, Mengxin Zheng
Findings of the Association for Computational Linguistics (ACL), 2024
[Paper (PDF)] [Code]

[ISLPED 24] OFHE: An Electro-Optical Accelerator for Discretized TFHE
Mengxin Zheng, Cheng Chu, Qian Lou, Nathan Youngblood, Mo Li, Sajjad Moazeni, Lei Jiang
Proceedings of the 29th ACM/IEEE International Symposium on Low Power Electronics and Design (ISLPED), 2024
[Paper (PDF)]

[PACT 24] BoostCom: Towards Efficient Universal Fully Homomorphic Encryption by Boosting the Word-wise Comparisons
Ardhi Wiratama Baskara Yudha*, Jiaqi Xue*, Qian Lou, Huiyang Zhou, Yan Solihin
The International Conference on Parallel Architectures and Compilation Techniques (PACT), 2024
[Paper (PDF)]

[ECCV 24] WBP: Training-time Backdoor Attacks through Weight Bit Poisoning.
Kunbei Cai, Zhenkai Zhang, Qian Lou, Fan Yao
The 18th European Conference on Computer Vision (ECCV), 2024
[Paper (PDF)] [Code]

[ECCV 24] SSL-Cleanse: Trojan detection and mitigation in self-supervised learning.
Mengxin Zheng, Jiaqi Xue, Zihao Wang, Xun Chen, Qian Lou, Lei Jiang, Xiaofeng Wang
The 18th European Conference on Computer Vision (ECCV), 2024
[Paper (PDF)] [Code]

[Mathematics 24] Unveiling Fall Triggers in Older Adults: A Machine Learning Graphical Model Analysis
Tho Nguyen, Ladda Thiamwong, Qian Lou, Rui Xie
Mathematics, 2024
[Paper (PDF)]

[NAACL 24] TrojFSP: Trojan Insertion in Few-shot Prompt Tuning
Mengxin Zheng, Jiaqi Xue*, Xun Chen, Yanshan Wang, Qian Lou, Lei Jiang
Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL), 2024
[Paper (PDF)] [Code]

Patents

[US20240080423A1] Fusion techniques for combining most significant bits and least significant bits of image data in image processing or other applications
Wenbo Li, Zhipeng Mo, Yi Wei, Burak Uzkent, Qian Lou, Yilin Shen, Hongxia Jin
[Patent (PDF)]

[US20230177338A1] Small and fast transformer model for multi-modal or other tasks
Qian Lou, Yen-Chang Hsu, Burak Uzkent, Ting Hua, Yilin Shen, Hongxia Jin
[Patent (PDF)]

[US20230104491A1] Small and fast transformer with shared dictionary
Qian Lou, Yilin Shen, Hongxia Jin, Ting Hua, Yen-Chang Hsu
[Patent (PDF)]

[US20230106213A1] Machine learning model compression using weighted low-rank factorization
Yen-chang Hsu, Ting Hua, Feixuan Wang, Qian Lou, Yilin Shen, Hongxia Jin
[Patent (PDF)]

[US20220121947A1] Method and system for secure, accurate and fast neural network inference
Qian Lou, Yilin Shen, Hongxia Jin
[Patent (PDF)]