CityU

Assistant Professor (Research) Heng Xu


Dr. Heng Xu

Assistant Professor (Research) Master Supervisor

E-mail: hengxu@cityu.edu.mo

Tel:  (853) 8590 2397

Office address:  Room S504, Stanley Ho Building, City University of Macau (Taipa)

 

Educational qualifications

  • 2025 Doctor of Philosophy in Computer Science, University of Technology Sydney, Australia
  • 2021 Master of Information Security, China University of Geosciences (Wuhan) Hubei, China
  • 2018 Bachelor of Information Security, China University of Geosciences (Wuhan) Hubei, China

 

Research interests

  • AI Security, Machine Unlearning

 

Research and publication

Journal and Conference:

  1. Heng Xu, Tianqing Zhu, Wanlei Zhou, Wei Zhao. Don’t Forget Too Much: Towards Machine Unlearning on Feature Level, IEEE Transactions on Dependable and Secure Computing, 2024. (CCF-A, JCR Q1)
  2. Heng Xu, Tianqing Zhu, Lefeng Zhang, Wanlei Zhou, Philip S Yu. Machine Unlearning: A Survey. ACM Computing Surveys. 56, pp: 1-36, 2024. (Highly Cited Paper) (IF=16.6, JCR Q1)
  3. Heng Xu, Tianqing Zhu, Lefeng Zhang, Wanlei Zhou, S Yu Philip, Update Selective Parameters: Federated Machine Unlearning Based on Model Explanation. IEEE Transactions on Big Data, 2024. (IF=7.5, JCR Q1)
  4. Heng Xu, Tianqing Zhu, Lefeng Zhang, Wanlei Zhou, Wei Zhao, Towards Efficient Target-Level Machine Unlearning Based on Essential Graph. IEEE Transactions on Neural Networks and Learning Systems. (IF=10.4, JCR Q1)
  5. Xiaocui Dang, Priyadarsi Nanda, Heng Xu, Manoranjan Mohanty, Haiyu Deng, A Novel Scheme For Recommendation Unlearning Verification (RUV) Using Non-influential Trigger Data. International Conference on Security of Information and Networks, 2024. (Australia CORE C)
  6. Xiaocui Dang, Priyadarsi Nanda, Heng Xu, Haiyu Deng and Manoranjan Mohanty, Recommendation System Model Ownership Verification via Non-influential Watermarking. IEEE Consumer Communications &Networking Conference, 2025. (Australia CORE B)
  7. Kaiyue Feng, Guangsheng Zhang, Huan Tian, Heng Xu, Yanjun Zhang, Tianqing Zhu, Ming Ding, and Bo Liu, RAGLeak: Membership Inference Attacks on RAG-based Large Language Models. The 30th Australasian Conference on Information Security and Privacy 2025. (CCF-C)
  8. Peng Huang, Mengyao Hou, Tong Sun, Heng Xu, Chuanming Ma, Aiguo Zhou, Sustainable groundwater management in coastal cities: Insights from groundwater potential and vulnerability using ensemble learning and knowledge-driven models, Journal of Cleaner Production, 442, 141152, 2024. (IF=9, JCR Q1)
  9. Fan Yang, Chaoqun Zhu, Heng Xu, Yongfeng Qian, Jun Song. An efficient malicious webpage static detection framework based on optimized Bayesian and hybrid machine learning. Concurrency and Computation: Practice and Experience, 34(10), 2021. (Best Paper Award) (CCF C)
  10. Yizhi Liu, Chaoqun Zhu, Yadi Wu, Heng Xu and Jun Song. MMWD: An efficient mobile malicious webpage detection framework based on deep learning and edge cloud. Concurrency and Computation: Practice and Experience, 33(18), 2021. (CCF C)
  11. Weihua Hua, Heng Xu, Jianchao Duan, Jun Song, Fan Yang. VMPS: A Vector Map Protection Framework Supporting Dynamic Game and Local Desensitization. Research Square, 2022.
  12. Junru Peng, Heng Xu, Jun Song, HRSE: A novel high-speed random sampling encryption scheme on big data, in Proc of 15th International Conference on Big Data Science and Engineering, pp. 57-64. 2021.
  13. Fan Yang, Zhao Ma, Heng Xu, An Efficient Redundancy Control and Load Balancing Scheme for Cloud Storage, in Proc of 15th International Conference on Big Data Science and Engineering, pp. 49-56, 2021.

 

Patents:

  1. A Method and System for Converting PowerPoint to Word Documents, China Patent:CN-110222317-B, 2019-09-10.
  2. A Method and System for Converting Word Documents to PowerPoint Documents, China Patent: CN-110083580-B, 2019-08-02.
  3. A Method and System for Converting Beamer to PowerPoint, China Patent: CN-109918351-B, 2021-04-23.
  4. A Method and System for Converting Word Documents to LaTeX Documents Using JAVA, China Patent: CN-109918622-B, 2020-12-08.
  5. A Method and System for Converting Word Documents to LaTeX Documents, China Patent: CN-110147530-B, 2019-08-20.
  6. A Method and System for Converting LaTeX Documents to Word Documents, China Patent: CN-110147534-B, 2019-08-20.
  7. A Method and System for Converting PowerPoint Documents to Beamer Documents, China Patent: CN-109885818-B, 2019-06-14.
  8. Secure Label Login System based on QR Code, China Patent: CN-109214161-B, 2020-09-29.
  9. Game Theory-Based Method for Optimal Local Desensitization of Vector Maps, China Patent: CN-113051357-B, 2022-09-30.
  10. A High-Speed Random Sampling Encryption Method for Geological and Geographic Big Data, China Patent: CN-113098843-B, 2022-06-14.
  11. A Multi Combination Real-Time Detection System for Mobile Malicious Webpages, China Patent: CN-113055890-B, 2022-08-26.
  12. A Method for Protecting Confidential Geographic Tabular Data Based on Generative Adversarial Networks, China Patent: CN-113051604-B, 2021-06-29.
  13. A Time-Controlled File Access Method, Device, and Storage Device, China Patent: CN-108400966-B, 2020-08-07.
  14. A Method for Anonymous Document Review, China Patent: CN-107948161-B, 2020-08-07.
  15. A Dual Detection Method and System for Nested QR Code Attacks, China Patent: CN-109145675-B, 2020-08-25.
  16. A Method for Adding and Integrating Slide Annotations, China Patent: CN-108010107-B, 2020-08-07.
  17. A Bimodal Biometric Encryption Method, Device, and Storage Device, China Patent: CN-109614804-B, 2021-04-27.

 

Academic Awards

  1. China National Scholarship for Outstanding Self-financed Students Abroad 2025.
  2. ARC Discover Project Scholarship，University of Technology Sydney 2022–2025.
  3. International Research Scholarship，University of Technology Sydney 2022–2025.
  4. ARC Linkage Project Scholarship top-up. University of Technology Sydney 2022 – 2025.
  5. First Prize in the 4th China Graduate Contest on Application, Design and Innovation of Mobile-Terminal. 2018.
  6. Second Prize in the 10th National College Student Information Security Competition. 2017.