zkCrowd: A Hybrid Blockchain-Based Crowdsourcing Platform

Saide Zhu, Zhipeng Cai, Huafu Hu, Yingshu Li, Wei Li

Research output: Contribution to journalArticlepeer-review

161 Scopus citations


Blockchain, a promising decentralized para-digm, can be exploited not only to overcome the shortcomings of the traditional crowdsourcing systems, but also to bring technical innovations, such as decentralization and accountability. Nevertheless, some critical inherent limitations of blockchain have been rarely addressed in the literature when it is incorporated into crowdsourcing, which may yield the performance bottleneck in the crowdsourcing systems. To further leverage the superiority of combining blockchain and crowdsourcing, in this article, we propose an innovative hybrid blockchain crowdsourcing platform, named zkCrowd. Our zkCrowd integrates with a hybrid blockchain structure, smart contract, dual ledgers, and dual consensus protocols to secure communications, verify transactions, and preserve privacy. Both the theoretical analysis and experiments are performed to evaluate the advantages of zkCrowd over the state of the art.

Original languageEnglish (US)
Article number8839831
Pages (from-to)4196-4205
Number of pages10
JournalIEEE Transactions on Industrial Informatics
Issue number6
StatePublished - Jun 2020

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering


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