SecBCS: a secure and privacy-preserving blockchain-based crowdsourcing system

Chao Lin, Debiao He, Sherali Zeadally, Neeraj Kumar, Kim Kwang Raymond Choo

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


A robust and scalable crowd management infrastructure is crucial in addressing operational challenges when deploying high-density sensors and actuators in a smart city. While crowdsourcing is widely used in crowd management, conventional solutions, such as Upwork and Amazon Mechanical Turk, generally depend on a trusted third-party platform. There exist several potential security concerns (e.g., sensitive leakage, single point of failure and unfair judgment) in such a centralized paradigm. Hence, a recent trend in crowdsourcing is to leverage blockchain (a decentralized ledger technology) to address some of the existing limitations. A small number of blockchain-based crowdsourcing systems (BCSs) with incentive mechanisms have been proposed in the literature, but they are generally not designed with security in mind. Thus, we study the security and privacy requirements of a secure BCS and propose a concrete solution (i.e., SecBCS) with a prototype implementation based on JUICE.

Original languageEnglish
Article number130102
JournalScience China Information Sciences
Issue number3
StatePublished - Mar 1 2020

Bibliographical note

Funding Information:
This work was supported in part by National Key Research and Development Program of China (Grant No. 2018YFC1604004), National Natural Science Foundation of China (Grant Nos. 61572379, 61772377, 61841701), and Natural Science Foundation of Hubei Province of China (Grant Nos. 2017CFA007, 2015CFA068). The last author is supported by Cloud Technology Endowed Professorship. We thank the anonymous reviewers for their valuable comments and feedback which helped us to improve the content and presentation of this paper.

Publisher Copyright:
© 2020, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.


  • blockchain
  • crowdsourcing
  • privacy-preserving
  • secure
  • smart contract

ASJC Scopus subject areas

  • Computer Science (all)


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