Profile

Dennis is currently a Teaching Fellow in the Department of Computing at The Hong Kong Polytechnic University. Dennis received his BSc (1st Hons), MPhil, and PhD degrees in Computer Science from City University of Hong Kong (CityU) in 2005, 2007 and 2014 respectively.

Dennis has more than 10 years of experience working in the tertiary education sector and is experienced in teaching in sub-degree, bachelor, and postgraduate levels for a variety of subjects, including programming, information security, software engineering, computer networking and multimedia. Dennis was conferred the Faculty Merit Award in Teaching (Individual) 2019/20 in PolyU and the Outstanding Teacher Award 2011 in the HKU School of Professional and Continuing Education (HKU SPACE). Dennis is experienced in providing trainings in cybersecurity/blockchain/distributed ledger technology (DLT). In 2019 - 2021, Dennis provided training on blockchain technologies to over 1,500 staff of the Office of the Government Chief Information Officer (OGCIO), HKSAR.

Dennis is experienced in academic programme development, ranging from short courses to postgraduate programmes. Dennis is currently the Deputy Programme Leader of BSc (Hons) Scheme in Computing – Computing Stream at PolyU. Due to his familiarity with quality assurance of academic programmes, Dennis was involved in various accreditation exercises and is the External Examiner/Academic Assessor of a number of IT and cybersecurity programmes of HKU SPACE. Dennis is also engaged in funded teaching and learning (T&L) projects to enhance cyber security education in the university. His research in cybersecurity education was conferred the Best Paper Award in IEEE TALE 2019.

Acting as the project investigator and technical consultant of a number of Blockchain/DLT industrial research and consultancy projects, Dennis is responsible for providing professional advices on the underlying cryptographic algorithms and protocols, as well as managing teams of engineers for the concrete implementations of crypto-libraries and blockchain-based application systems.

As the principal investigator (PI) of a number of T&L, research and consultancy projects, Dennis oversees projects with a total budget of over HKD5,500,000 since 2017.

Research Interests

• Applied Cryptography
• Blockchain Security
• Pedagogies for Cybersecurity Education

Book Chapters

• Dennis Y. W. Liu, Guozhi Xue, Yi Xie, Xiapu Luo and Man Ho Au. "Performance of Digital Signature Schemes on Mobile Devices". Mobile Security and Privacy. Advances, Challenges and Future Research Directions, Elsevier, 2016, 247 - 256.

Journal Articles

1. Pit Ho Patrio Chiu, Siu Wo Tarloff Im, Dennis Y. W. Liu and Vincent Wong. "Does active learning classroom support student innovation across disciplines?". Advanced Science Letters. 24(11). 8030–8033. doi: 10.1166/asl.2018.12484 (WoS)
2. Siu Wo Tarloff Im, Pit Ho Patrio Chiu, Chan Hung Shek, and Dennis Y. W. Liu. "Performance Evaluation of College of Science and Engineering Students with the PALSI Scheme." The International Journal of Science, Mathematics and Technology Learning. Volume 24, Issue 1, pp. 27-34. DOI: doi.org/10.18848/2327-7971/CGP/v24i01/27-34.
3. Dennis Y. W. Liu and Duncan S. Wong. "One-Move Convertible Nominative Signature in the Standard Model." Security and Communication Networks 9(12): 1796-1809 (2016), DOI: 10.1002/sec.812.
4. Dennis Y. W. Liu, Joseph K. Liu, Yi Mu, Willy Susilo and Duncan S. Wong. "Revocable Ring Signature." Journal of Computer Science and Technology (JCST), 22(6), Springer, Nov 2007, 785 - 794.
5. Qiong Huang, Dennis Y. W. Liu, Duncan S. Wong. "An efficient one-move Nominative Signature scheme." International Journal of Applied Cryptography (IJACT), 2008 - Vol. 1, No.2 pp. 133 - 143.

Conference Papers

1. Wang Fat Lau, Dennis Y. W. Liu, Man Ho Au. "Blockchain-Based Supply Chain System for Traceability, Regulation and Anti-Counterfeiting". The 4th IEEE International Conference on Blockchain (IEEE Blockchain-2021).
2. Winnie W. M. Lam and Dennis Y. W. Liu. "Using Robotics to Integrate Computational Thinking, Artificial Intelligence and Mathematics for STEM Education". International Conference on Learning and Teaching 2021 (ICLT2021).
3. Jingyi Li, Meng Zhao, Yong Ding, Dennis Y. W. Liu, Yujue Wang, Hai Liang. "An Aggregate Authentication Framework for Unmanned Aerial Vehicle Cluster Network". IEEE International Conference on Parallel & Distributed Processing with Applications, Big Data & Cloud Computing, Sustainable Computing & Communications, Social Computing & Networking (ISPA/BDCloud/SocialCom/SustainCom 2020). DOI:10.1109/ISPA-BDCloud-SocialCom-SustainCom51426.2020.00185.
4. Winnie W. M. Lam, Dennis Y. W. Liu and Kevin W. H. Yung. "Providing Personalized Learning Support with AI Chatbot" (abstract). The International Conference on Education and Artificial Intelligence 2020 (ICEAI 2020).
5. Sai Ming Lam, Dennis Y. W. Liu and Alven C. Y. Leung. "A case study of linking practical learning to professional and vocational fields for secondary students - the Hong Kong Applied Learning Aviation course" (abstract). Applied Learning Conference 2020.
6. Dennis Y. W. Liu, Alven C. Y. Leung, Man Ho Au, Xiapu Luo, Pit Ho Patrio Chiu, Siu Wo Tarloff Im and Winnie W. M. Lam. “Virtual Laboratory: Facilitating Teaching and Learning in Cybersecurity for Students with Diverse Disciplines”. IEEE International Conference on Teaching, Assessment, and Learning for Engineering 2019 (TALE 2019). DOI: 10.1109/TALE48000.2019.9225863. [Best Paper Award]
7. Winnie W. M. Lam, Haoran Xie, Dennis Y. W. Liu and Kevin W. H. Yung. “Investigating Online Collaborative Learning on Students' Learning Outcomes in Higher Education”. The 3rd International Conference on Education and E-Learning (ICEEL 2019). DOI: 10.1145/3371647.3371656.
8. Winnie W. M. Lam, Dennis Y. W. Liu and Issac K. H. Lo. "An Online Evidence-based Assessment System to Promote Collaborative Learning in Tertiary Education" (abstract). 2019 International Conference on Education and Learning (ICEL 2019).
9. Dennis Y. W. Liu, Chi Tsiu Tong and Winnie W. M. Lam. "Performance Analysis of Searchable Symmetric Encryption Schemes on Mobile Devices." The 12th International Conference on Network and System Security (NSS-2018). 80 - 94. DOI: 10.1007/978-3-030-02744-5_6.
10. Vincent Ng, Cao Jiannong, Dennis Liu, Sharon Keung, Laura Zhou, Ian Brown. "Retrieving Good Practices through Reviewing Past E-Learning Projects of Local Schools in Hong Kong." 2017 International Conference on Computational Science and Computational Intelligence (CSCI 2017), DOI: 10.1109/CSCI.2017.195.
11. Laura Zhou, Dennis Liu, Sharon Keung, Ian Brown, Jiannong Cao and Vincent Ng. "A Two-Phase Framework for Systematic Extraction of Good Practices for eLearning Projects." (abstract) Proceeding of eLearning Forum Asia 2017(eLFA2017), Hong Kong.
12. Pit Ho Patrio Chiu, Tsz Ki Frankie Fan, Siu Wo Tarloff Im, Shukhan Cheng, Lisa L. S. Chui, Lin Li, and Dennis Y. W. Liu. "A project-problem based learning approach for appreciating ancient cultural heritage through technologies: Realizing mystical buildings in Dunhuang Mural." IEEE International Conference on Teaching, Assessment, and Learning for Engineering 2016 (TALE 2016). DOI: TALE.2016.7851772.
13. Dennis Y. W. Liu, Duncan S. Wong and Qiong Huang. "Ambiguous One-Move Nominative Signature Without Random Oracles." The 16th Annual International Conference on Information Security and Cryptology (ICISC 2013), LNCS 8565, Springer-Verlag, 2014, 325 - 341.
14. Dennis Y. W. Liu and Duncan S. Wong. "One-Move Convertible Nominative Signature in the Standard Model." The 6th International Conference on Provable Security (ProvSec 2012), LNCS 7496, Springer-Verlag, 2012, 2 - 20.
15. Dennis Y. W. Liu, Duncan S. Wong, Xinyi Huang, Guilin Wang, Qiong Huang, Yi Mu and Willy Susilo. "Formal Definition and Construction of Nominative Signature." Proc. of the 9th International Conference on Information and Communications Security (ICICS 2007). LNCS 4861, Springer-Verlag, 2007, 57 - 68.
16. Dennis Y. W. Liu, Shuang Chang, and Duncan S. Wong. "A More Efficient Convertible Nominative Signature." Proc. of International Conference on Security and Cryptography (SECRYPT 2007), July 2007, 214 - 221.
17. Dennis Y. W. Liu, Shuang Chang, Duncan S. Wong and Yi Mu. "Nominative Signature from Ring Signature." Proc. of the 2nd International Workshop on Security (IWSEC 2007), LNCS 4752, Springer-Verlag, 2007, 396 - 411.

For my complete publication list, please refer to DBLP.

Conference Organizing Committee

• The 16th ACM ASIA Conference on Computer and Communications Security (ACM ASIACCS 2021)
• The 12th International Conference on Network and System Security (NSS-2018)

Funded Projects

• PI, Virtual Laboratories: Clearing the Hindrance of Teaching and Learning in Cybersecurity Courses, Online Teaching Development and Educational Research Grant, PolyU, 2021 - 22.
• PI, Threats Loom Large: Nurturing the Next Generation of Cybersecurity Researchers and Professionals, Strategic Plan Initiatives to Expand Research Elements in the Undergraduate Curriculum, PolyU, 2021 - 22.
• Co-I, Using AI Chatbot as Intelligent Tutor to Provide Personalized Feedback and Enhance Learning Support, Teaching Development Grant (TDG), The Education University of Hong Kong (EduHK), 2020 - 21.
• PI, Blockchain for Logistics – Connecting Physical Goods with their Digital Identifiers (PRP/010/19FX), Partnership Research Programme, 2019 - 2021.
• Co-PI, Preserving Blockchain Privacy from Zero-Knowledge Proof and Ring Signatures, Ant Shengxin, Ant Financial, 2019 - 20.
• Co-I, Blockchain-Based Food and Drug Counterfeit Detection and Regulatory System (UIM/331), ITF-UCIP Matching Grant for Joint Research Scheme, 2017 - 19.
• PI, Cyber Security: Understanding Blended Threats using Blended Learning, Teaching Development Grant (TDG), PolyU, 2017 - 18.
• Consolidation and Redevelopment Work on Information Technology (IT) in Education, Quality Education Fund (QEF), 2016 - 17. Deliverables || Seminar

Consultancy Services

• Visiting Lecturer, “Training on Blockchain Technologies”, Office of the Government Chief Information Officer (OGCIO), HKSAR, 2019 - 2021
• PI, Crypto-Library for Identity Management, Valigo Limited, 2019.
• Co-I, Blockchain-based Mobile Identity Management and Notarization Prototype, Valigo Limited, 2018 - 2019.

Certifications

• Corda Certified Developer (Badge Link)