Blockchain-based Credit and Arbitration Mechanisms in Crowdsourcing

Crowdsourcing is a distributed business service model brought by Internet. However, users always pursue the maximum benefits with the least effort, which may lead to the low quality of solutions submitted by receivers. In addition, each user is most concerned about their own benefits, and sometimes they do not objectively evaluate the solutions. Based on blockchain technology, this paper implements crowdsourcing process through smart contract, and proposes credit and arbitration mechanisms suitable for general online industrial services. To be specific, the credit mechanism defines the historical reputation of each user through credit score, which is beneficial for the sender to find a satisfactory receiver, and provides criteria for the selection of members of the arbitration institution. We also combine punishment and incentive measures to ensure the earnest implementation of the crowdsourcing business by users. Arbitration mechanism refers to the arbitration of task solutions submitted by receivers through the decentralized and credible arbitration institution rather than senders or the crowdsourcing platform, which ensures the fairness and impartiality of the solution evaluation. The experimental results demonstrate the effectiveness of the proposed credit mechanism and arbitration mechanism.