Survey of Crowdsourcing Applications in Blockchain Systems

Blockchain technology can be widely used in various services, such as online micropayments, supply chain tracking, medical record sharing, and crowdsourcing. Applying this technology to crowdsourcing systems can get a decentralized, A privacy-protected, verifiable and traceable crowdsourcing service platform. With the development of blockchain technology, many blockchain-based crowdsourcing solutions have emerged, but there is a lack of overview of related research. At present, researchers mainly start from Research on decentralized crowdsourcing systems from two perspectives: a decentralized crowdsourcing platform based on smart contracts and a decentralized crowdsourcing platform based on blockchain architecture. The article provides a detailed overview of the main blockchain-based decentralized crowdsourcing platforms. Centralized crowdsourcing related work, and summarized the problems that have occurred in existing technologies, such as the security of the blockchain system, the security of smart contract