The Third International Workshop on Blockchain and Data Management (BlockDM 2021)
In Conjunction with ICDE 2021, April 19, 2021, Chania, Crete, Greece

Due to the COVID-19 pandemic and imposed travel restrictions, BlockDM 2021 will be held virtually as an online event. Register here to attend the workshop online.


Blockchain has been emerging as a potential technology to disrupt traditional database systems. Over the past decade, it has found numerous applications in finance, IoT, healthcare, supply chain, e-commerce, and so on, and is becoming a hot research area. In contrast to traditional database systems, blockchain is decentralized, immutable, and cryptographically secured, where no single entity has full control of the system. This new technology has significantly changed the way of data access, storage, retrieval, and information discovery. It presents many fundamental research challenges for management of data in blockchain.

The aim of this workshop is to bring together researchers and practitioners working on blockchain systems from different data management aspects, including storage management, fault tolerance, query processing, information discovery, transaction management, security and privacy. We encourage papers that apply ideas and techniques from different areas to understand the problems and challenges in blockchain systems and propose innovative solutions. We also welcome papers that report novel systems and applications built with blockchain technology. Topics of interest include, but are not limited to, the following:

  • Blockchain data management
  • Blockchain data provenance
  • Blockchain consensus and fault tolerance mechanisms
  • Blockchain system design, performance and optimization
  • Blockchain storage and retrieval management
  • Blockchain and federated learning
  • Data security, privacy and trust in blockchain
  • Information retrieval on blockchain
  • Data mining and knowledge discovery on blockchain
  • Query processing on blockchain
  • Transaction management on blockchain
  • Smart contract and distributed ledger
  • Cross-blockchain algorithms, architectures and systems
  • Large-scale field studies of blockchain data management systems
  • Benchmarking of blockchain data management systems
  • Blockchain-based Web 3.0 decentralized infrastructure and application platforms

Supported by

Hong Kong Baptist University (HKBU)

Blockchain and FinTech Lab, Department of Computer Science, HKBU


Workshop Program (tentative)
(April 19, 2021)

Times are displayed in US Pacific. Look up your local times here.




Keynote 1

Ying Yan (AntGroup and Alibaba Damo Academy)



Keynote 2

Panagiotis Antonopoulos (Azure SQL Database Group, Microsoft)
9:00-9:20 Talking Blockchains: The Perspective of a Database Researcher
Felix Schuhknecht (Johannes Gutenberg-University Mainz)
9:20-9:40 Towards a Blockchain Database for Massive IoT Workloads
Panagiotis Drakatos (University of Cyprus), Erodotos Demetriou (University of Cyprus), Stavroulla Koumou(University of Cyprus), Andreas Konstantinidis (Frederick University), Demetrios Zeinalipour-Yazti (University of Cyprus)


9:50-10:10 Measuring Decentralization in Bitcoin and Ethereum using Multiple Metrics and Granularities
Qinwei Lin (Beijing Jiaotong University), Chao Li (Beijing Jiaotong University), Xifeng Zhao (Beijing Jiaotong University) and Xianhai Chen (Beijing Jiaotong University)
10:10-10:30 Transparent Contribution Evaluation for Secure Federated Learning on Blockchain
Shuaicheng Ma (Emory University), Yang Cao (Kyoto University), Li Xiong (Emory University)
10:30-10:50 PDS2: A User-Centered Decentralized Marketplace for Privacy Preserving Data Processing
Lodovico Giaretta (KTH), Ioannis Savvidis (University of Cyprus), Thomas Marchioro (Institute of Computer Science Foundation for Research and Technology), Sarunas Girdzijauskas (KTH), George Pallis (University of Cyprus), Marios D. Dikaiakos (University of Cyprus), Evangelos Markatos (Institute of Computer Science Foundation for Research and Technology)
10:50-11:10 C3HSB: A Transparent Supply Chain for Multi-cloud and Hybrid Cloud Assets Powered by Blockchain
Srini Bhagavan (University of Missouri-Kansas City), Praveen Rao (University of Missouri-Columbia), Thuan Ngo (IBM Corporation)

Closing Remarks

Submission Guidelines

We solicit submissions of original papers that are not being considered for publication elsewhere. Both regular papers and short papers (reporting work in progress, providing system experience, or suggesting possible research directions) are welcome.

All submissions need to follow IEEE Computer Society Proceedings Manuscript Formatting Guidelines. See templates here. The followings are the page limits:

Regular paper:6-8 pages
Short paper:3-4 pages

The submission site is:

Important Dates

Paper Submission:Jan 12, 2021
(Extended to Jan 25, 2021)
Result Notification:Feb 22, 2021
Camera Ready:March 1, 2021
Workshop Date:Apr 19, 2021


Workshop Chairs:

Yuzhe Tang (Syracuse University, USA)

Jianliang Xu (Hong Kong Baptist University, HK)

Demetris Zeinalipour (University of Cyprus, Cyprus)

Program Committee:

Amr El Abbadi, University of California - Santa Barbara, USA

Mohammad Javad Amiri, University of California - Santa Barbara, USA

Manuel Bravo, IMDEA Software Institute Madrid, Spain

Yang Cao, Kyoto University, Japan

Jinchuan Chen, Renmin University of China, China

Tien Tuan Anh Dinh, Singapore University of Technology and Design, Singapore

Yue Duan, Illinois Institute of Technology, USA

Davide Frey, INRIA, France

Cheqing Jin, East China Normal University, China

Chao Li, Beijing Jiaotong University, China

Kai Li, Syracuse University, USA

Balaji Palanisamy, University of Pittsburgh, USA

Zhe Peng, Hong Kong Baptist University, Hong Kong

Ravi Ramamurthy, Microsoft, USA

Mohammad Sadoghi, University of California - Davis, USA

Felix Martin Schuhknecht, Johannes Gutenberg-University Mainz, Germany

Xusheng Xiao, Case Western Reserve University, USA

Cheng Xu, Simon Fraser University, Canada

Mu Zhang, University of Utah, USA

Zhiwei Zhang, Beijing Institute of Technology, China

Previous Workshops