Huiping Sun
Information Security Laboratory
School of Software and Microelectronics
Peking University
I am a Lecturer in the Department of Information Security, School of Software and Microelectronics, Peking University (PKU). I am a member of the Information Security Laboratory and the Blockchain Research Center at PKU.
My research explores Blockchain, FinTech, LLM Agent and Identity Management, with current focus on BFT and its accountability, PCN, Agent Memory, AuthN, AuthZ and Audit.
Research
My work asks how untrusting parties can share a ledger, and how the systems and agents built on it can be held accountable. It has moved through four connected stages, each raising the question the previous one could not answer: identity management asked who may act and how actions are audited; BFT asked how nodes agree and how a misbehaving node is exposed; blockchain asked how that agreement scales across shards and payment channels; and the LLM agent now asks how an agent's memory can be evicted and audited so that its behaviour is trusted and traceable on the same infrastructure.
Current projects
- BFT Security and Liveness Accountability
- PCN Model and Pooling
- Agent Memory Eviction and Audit
Teaching
- Blockchain — MEM, Fall 2026
- Blockchain Technology and Applications — Spring 2026
- Blockchain and Digital Finance — FinTech, Spring 2027
- Distributed Trust and Consensus Practice — Spring 2027
Publications
Selected. Full list on DBLP and Google Scholar.
- GALUPA: Gossiping Aggregated Locking and Output Proofs for Accountability in BFT. Baolin Li, Huiping Sun, Zhong Chen. IEEE ICDCS 2026. PaperConference
- EHRAuditChain: Scalable Privacy-Preserving EHR Audit with RSA Accumulators on Blockchain. Wei Zhu, Meiyun Zuo, Huiping Sun. Information Sciences, 2026. Paper
- Introduction to Blockchain(区块链导论). Zhong Chen, Huiping Sun. People's Posts and Telecommunications Press, 2025 (textbook, in Chinese). Book
- CFAuditChain: Audit BlockChain Based on Cuckoo Filter. Kang Liu, Yang Lu, Shiyi Tan, Wei Liang, Huiping Sun, Zhong Chen. The Computer Journal, 2024. Paper
- Survey on BFT Accountability Mechanisms. Huiping Sun, Jinjue Zhou, Shuxuan Liu, Zhong Chen. Netinfo Security 24(1), 2024 (in Chinese). Paper
- ESUM: An Efficient UTXO Schedule Model. Meilin Lv, Kangjian Wei, Henry Kao, Huiping Sun, Zhong Chen. IEEE ICBC 2022. Paper
- DPLogChain: A Dynamic Packaging LogChain based on Random Witness. Shiyi Tan, Yang Lu, Kang Liu, Huiping Sun, Zhong Chen. IEEE ICC 2022. Paper
- Lattice BERT for Spoken Language Understanding. Ye Zou, Huiping Sun, Zhong Chen. ICONIP 2021. Paper
- OverlapShard: Overlap-based Sharding Mechanism. Yanan Liu, Huiping Sun, Xu Song, Zhong Chen. IEEE ISCC 2021. Paper
- HoneyHash: Honeyword Generation Based on Transformed Hashes. Canyang Shi, Huiping Sun. NordSec 2020. Paper
- Research on Blockchain Performance Scalability and Security. Zhilai Mao, Yanan Liu, Huiping Sun, Zhong Chen. Netinfo Security 20(3), 2020 (in Chinese). Paper
- Image-synch: A Liveness Detection Method Based on Ambient Image (poster). Yuan Sun, Huiping Sun, Xixin Cao. NDSS 2020. Paper
- PassPage: Graphical Password Authentication Scheme Based on Web Browsing Records. Xian Chu, Huiping Sun, Zhong Chen. AsiaUSEC 2020 (with FC 2020). Paper
- Sharding and Trading of Vehicles Odometer Data Based on Blockchain. Yanan Liu, Yangyang Deng, Huiping Sun, Zhong Chen. Insurance Theory & Practice, 2019 (in Chinese). Paper
- PassApp: My App is My Password! Huiping Sun, Ke Wang, Xu Li, Nan Qin, Zhong Chen. MobileHCI 2015. PaperSlidesVideoMore
- SlidePIN: Slide-Based PIN Entry Mechanism on a Smartphone. Huiping Sun, Shuaiying Guo, Ke Wang, Nan Qin, Zhong Chen. PASSWORDS 2014. PaperSlidesMore
- CQARank: Jointly Model Topics and Expertise in Community Question Answering. Liu Yang, Minghui Qiu, Swapna Gottipati, Feida Zhu, Jing Jiang, Huiping Sun, Zhong Chen. ACM CIKM 2013. Paper
- Filtering Spam in Social Tagging System with Dynamic Behavior Analysis. Bo Liu, Ennan Zhai, Huiping Sun, Yelu Chen, Zhong Chen. ASONAM 2009. Paper
- A Trust and Risk Framework to Enhance Reliable Interaction in E-Commerce. Yan Li, Ming Zhao, Huiping Sun, Zhong Chen. IEEE ICEBE 2008. Paper
- Analysis and Improvement in Supermarket Service Model. Dihui Bao, Yelu Chen, Huiping Sun, Zhong Chen. ICSS 2008. Best Paper.
Students
Current
Alumni
Over 100 graduates since 2006. Where they went, by graduation year:
2024 – 2026
2020 – 2023
2015 – 2019
2006 – 2014
Professional Service
- FinTech expert, Beijing Municipal Science & Technology Commission (2022–present)
- Judge: Digital China Innovation Competition (2020, 2021, 2024); Xiongan International FinTech Innovation and Technology Application Competition (2024, 2025)
- Program committee: CPSCom (2013, 2015), RFIDSec Asia (2011, 2013), CIT 2012, iThings 2011, BWCCA 2010, MIST 2010, AIR (2008, 2009)
- Reviewer: IEEE Computer, IEEE Communications Magazine, IEEE TDSC, IEEE TSC, IEEE TNSM, IEEE Systems Journal, ACM TOIT, The Computer Journal, Security and Communication Networks, Peer-to-Peer Networking and Applications, IEICE Transactions
Contact
sunhp@ss.pku.edu.cn
Room 1530, No. 1 Building of Science, Peking University, Beijing 100871, China