Research On Blockchain And Searchable Encrypted PROV Provenance Data Sharing

In the field of digital traceability,security research has always been a crucial issue and one of the difficulties.In data sharing,traceability security research includes both the security protection of shared traceability information and the security protection of shared data.At present,most security protection methods for traceability information almost entirely rely on third-party verification.This method still faces the risk of traceability information being tampered with or maliciously judged by third parties due to the untrustworthy nature of third parties.Blockchain technology has distributed characteristics and can achieve reliable traceability information protection for data sharing without the help of third parties.Therefore,based on the PROV traceability model,a traceability data sharing scheme combining blockchain and searchable encryption is proposed.The main research work of the thesis includes:(1)A PROV-BSE traceability data sharing scheme has been proposed.This solution first addresses the issue of traceability information being easily tampered with,and uses blockchain technology to store records of traceability information to ensure tamper resistance of traceability data.Secondly,in response to the data security issues in the file server during the data sharing process,a multi keyword search encryption method was adopted,and a smart contract in blockchain technology was designed to perform the search,achieving precise search of encrypted data in untrusted servers while protecting the security of the data in the server.After simulation verification,this scheme has made certain improvements in security,shared data availability,and traceability information integrity.(2)Based on the PROV-BSE traceability data sharing scheme,this article designs a PROV traceability data sharing system that combines blockchain and searchable encryption.It attempts to achieve data sharing and upload and query traceability information in practical scenarios,and verifies the security of traceability information.