Secure multi-party summation/product is a typical problem of Secure Multi-Party Computation(MPC),which has been widely applied in smart power grid,electronic voting,joint credit investigation and other scenarios in recent years.How to protect data privacy is a key problem in secure multi-party summation/product computation applications.In order to solve this problem,the blockchain is introduced to build a trusted data sharing environment.Based on this,combined with verifiable secret sharing protocol,a simple and feasible privacy protection scheme for outsourced secure multi-party statistical computing based on blockchain is designed.The security and feasibility of the scheme are proved by the application example.Theoretical analysis and experimental tests show that the scheme can realize the verifiable privacy protection of data in the secure multi-party statistical computation process,and has lower computational overhead than that of Feldman scheme in the data verification process.
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