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
I mainly work on Blockchain, PCN, BFT, Identity, FinTech and Agent Memory. If you are interested or have any questions, please email me.
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.
2026
- 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
2025
- Introduction to Blockchain（区块链导论）. Zhong Chen, Huiping Sun. People's Posts and Telecommunications Press, 2025 (textbook, in Chinese). Book
2024
- 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
2022
- 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
2021
- 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
2020
- 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
2019
- 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
2015 and earlier
- 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
Ruoheng Wang 2025 MSE · Agent
Weizhen Wang 2025 MSE · Agent
Yanfeng Zheng 2025 MSE · Blockchain
Yinghao Xu 2025 MSE · Blockchain
Yufang Wang 2025 MSE · Blockchain
Yiming Zhu 2025 MCS · PCN
Peilu Guo 2024 MSE · PCN
Xiangyang Li 2024 MSE · Blockchain
Yueqi Wu 2024 MSE · PCN
Rui Zhou 2024 MSE · Accountability
Jinji Fu 2024 MSE · Accountability
Jiawei Cheng 2024 MSE · Accountability
Alumni
Over 100 graduates since 2006. Where they went, by graduation year:
2024 – 2026
Zecheng Liu China Unicom, 2026Di Gao ByteDance, 2026Chang Dai ByteDance, 2026Changhao Zhang ByteDance, 2026Chicheng Qian NFRA Jiangsu, 2026Baiyue Yin Tencent, 2026
Yifu Zhang ByteDance, 2025Shuaishuai Ni Baidu, 2025Shuxuan Liu ByteDance, 2025Jinjue Zhou China Life, 2025Yiseng Hong PhD, Tsinghua, 2025Baolin Li Kuaishou, 2025Meijun Liu MS, HKUST-GZ, 2025Lifeng Ding MS, Tsinghua SIGS, 2025
Bingyu Liu China Development Bank, 2024Haotian Zhao China Mobile, 2024Xinyu Song China Unicom Digital Tech, 2024Chengye Jiang Ant Group, 2024Xiangchao Dong Maanshan Finance Bureau, 2024Kexin Tang MS, Univ. of Washington, 2024Yunxi Shi MS, Univ. of Hong Kong, 2024Weiao Feng Meituan, 2024
2020 – 2023
Xu Song Uranus Research, 2023Xin Liu ByteDance, 2023Yang Lu 2023Jiang Wu China Life Shanghai, 2023Shiyi Tang Ant Group, 2023Meng Zhao Alibaba, 2023Yining Liang MS, TU Eindhoven, 2023Yuang Chen MS, NUS, 2023
Meilin Lv Meituan, 2022Haoran Li Tencent, 2022Kangjian Wei Tencent, 2022Fanfei Gao Alibaba, 2022Ye Zhou CASIC, 2021Hengli Gao XPeng, 2022Linfeng Li MS, Univ. of Hong Kong, 2022Yining Ma MSDS, Columbia, 2022
Yanan Liu Bank of China, 2021Yuan Sun ICBC, 2021Yuan Wang Wujiang Gov., Suzhou, 2021Zehao Xu ChinaSo, 2021Jiahao Zhang CSDC, 2021Chenshuo Liu Agricultural Bank of China, 2021Yibo Xu Nanjing Gov., 2021Zhijiao Guo China Development Bank, 2021
Sijia Du Bank of Communications, 2020Mingyi Ma PhD, Tsinghua, 2023Mengyao Guo 2020Tiantong Pu BICI, 2020Xin Chen Industrial Bank, 2020Hui Li 2020Xian Chu China Everbright Bank, 2020Kunpeng Ren PhD, NTU Singapore, 2020
2015 – 2019
Haotian Hao Bank of China, 2019Kai Wang Xiaomi, 2019Youyou Yuanmei Bank of China, 2019Zilai Mao CSDC, 2019Xiaolin Qin Beijing Unicom, 2019Jiquan Chen Guangdong Telecom, 2019Yangyang Deng PhD, Univ. of Melbourne, 2019Ziwei Zhu PhD, Duke, 2019
Xuwen Han 2018Xiaolu Li NetsUnion Clearing, 2018Mengyu Xuan Peking University, 2018Xingming Song Haikou Bank, 2018
Jingshu Lv Bank of China, 2017Meng Wei Agricultural Development Bank, 2017Hao Zhang Shanxi Provincial Gov., 2017Ke Wang VISA Research; PhD, UNC, 2017
Xu Li Henan Public Security Dept., 2016Yufeng Fu NFRA Beijing, 2016Nan Qin Garena, Singapore, 2016Jianchao Guo MIIT Information Center, 2016Yanan Gao State Information Center, 2016Yi Liu Agricultural Bank of China, 2016
Yuting Liu China Construction Bank, 2015Jiaxu He Meituan, 2015Song Chang 2015
2006 – 2014
Liu Yang Google Research; PhD, UMass Amherst, 2014Di Wang Ping An, 2014Shuaiying Guo Alibaba, 2014Xuanting Song Sunlands, 2014Desheng Zhou 2014Wenpeng Cui State Grid, 2014Qian Hou iQIYI, 2014
Meimei Liu China Resources, 2013Yuan Pan 2013Linfang Hu 2013Wenya Feng PhD, 2013
Minghui Cui SPD Bank, 2012Zhouwei Su China Minsheng Bank, 2012Shun Li CBRC, 2012Zhenxiang Wu Agricultural Bank of China, 2012Ying Sun Agricultural Bank of China, 2012Kai Ma CICC, 2012Kai Lin CCBFT, 2012Fan Zhang Tencent, 2012Qing Shao 2012Zibin Yang Technical Director, iQIYI, 2012Changjun Shuai Agricultural Bank of China, 2012
Cheng Lian Momenta, 2011Qin Guo Microsoft, USA, 2011Wenqing Lu 2011Bo Yang China Merchants Bank, 2011
Yelu Chen ED/VP, Goldman Sachs Tokyo, 2010Dihui Bao VP, Goldman Sachs HK, 2010Bo Liu 2010Ennan Zhai PhD, Yale, 2010Yi Miao 2010Yan Chen 2010
Yan Li PhD, SMU Singapore, 2009Ming Zhao 2009Zhenfei Wu DongMei, 2009Xiaobo Qu 2009Yan Yang 2009
Jianxing Xie Vice County Mayor, Anxi, 2008Jingyuan Wang Security Director, XinAo Group, 2008Yanchang Xiao China Telecom, 2008Yi Peng Product Director, AutoNavi, 2008
Dongjun Heng TAL Education, 2007Hongtao Bai Security Director, China Mobile IoT, 2007Shen Liu 2007Xiaowei Feng ZoFun, 2007
Biao Wu Bank of China Mauritius; PhD, Renmin Univ., 2006Zhengang Wu CNBM Technology; PhD, PKU, 2006
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