| With the widespread application of computer technology and the rapid development of internet technology,the construction and use of digital archive systems has become an inevitable development trend of archival work.At present,the storage method of archival files is changing from paper and CD storage to electronic storage.However,electronic archives are usually stored in centralized databases and file systems,facing the risks of being stolen,tampered,deleted and so on.Therefore,it has become an urgent problem to build a security management method and mechanism for different digital archive database systems.At present,the problems of archives management are data insecurity and weak management ability.The traditional centralized and distributed archival management methods have some problems of data tampering and inconsistency.The introduction of blockchain can effectively protect and manage archival data.At the same time,the current blockchain can not effectively store and manage heterogeneous electronic archives.By combining IPFS(Inter Planetary File System)and smart contract technology,can be ensured the secure storage and access of heterogeneous electronic archives.Therefore,based on the blockchain,IPFS and smart contract technologies,this thesis studies the security management of archives,mainly including the following aspects:1.Propose a blockchain-based heterogeneous archive data security storage model: to address the problem of low security of existing heterogeneous archive data storage solutions,this thesis proposes a secure storage model for heterogeneous archive data based on blockchain and IPFS.Design different storage schemes for structural and non-structural archival data to achieve safe storage of archive data of different structures and granularities.2.Propose a smart contract-based archive access control method: in order to achieve a more secure,transparent and flexible archive access control policy,this thesis combines smart contract technology to propose role-based hierarchical dynamic access control and m-n multi-signature-based access control method.These methods can achieve secure access to archive files in a variety of demand scenarios.3.Study blockchain supporting platform for archive information systems:develop archival blockchain middleware systems,and integrate with the blockchain and IPFS to achieve secure storage and access control of archival data.In view of the threats and deficiencies of the current archival system and archival data,this thesis combines decentralized,tamper-proof,and trusted features of blockchain,IPFS and smart contract to effectively ensure the security of archive data. |
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