关键词: 区块链, 云制造, 服务组合, 信息安全, 信任机制

Abstract: In Cloud Manufacturing (CMfg) model,the trust between supplier and demander in the manufacturing service transaction needs to be solved urgently.As a distributed public ledger technology,the development of blockchain has attracted wide attention in industry and academia fields.Aiming at the key problems in the current cloud manufacturing service platform,a manufacturing service composition approach based on blockchain was proposed.The key technologies such as multi-chain structure and its storage mode,dynamic QoS evaluation method and consensus algorithm were studied,and the resource rent-seeking and matching mechanism was designed based on smart contract.The results showed that the proposed method could self-adaptively complete manufacturing service composition while considering the openness and security of transaction information and the privacy of enterprise information,which had greatly enhanced the credibility of cloud manufacturing service platform and the overall efficiency of system.

Key words: blockchain, cloud manufacturing, manufacturing service composition, information security, trust mechanism