Design And Implementation Of File Management System Based On Block Chain Cloud Platform

With the continuous development of new Internet technologies,the development and construction of a safe and efficient digital archives management system is an inevitable requirement for archives work.However,in the process of traditional centralized digital file management,it faces security issues such as data tampering and destruction,and the management efficiency is not high.In response to these problems,the security management,data recovery and traceability of digital archives can be realized by introducing blockchain technology,and then combined with IPFS(Inter Planetary File System,Interstellar File System)technology,and other technologies such as data desensitization and file access control are introduced.And other security technologies can well solve the problems of difficult to guarantee the security of file data,easy to tamper with,low data reliability,difficult to store large data,and slow response speed.The main research content of this thesis is as follows:1.Aiming at the problem that current heterogeneous electronic archives are difficult to store efficiently,based on blockchain and IPFS,a hierarchical hash storage method based on file size is proposed,which realizes the expansion of storage capacity.This storage method can effectively solve the problem of storage and backup of large files in the blockchain-based electronic file management system.It not only ensures the security and completeness of file files,but also improves storage performance and efficiency,and achieves different sizes more quickly.Archival file storage and access.2.Introduced data desensitization technology for text-type electronic archives,strengthened privacy protection in the archives information management system,and prevented leakage of sensitive data.3.For the lack of security and transparency of traditional access control methods,based on smart contracts,a hierarchical security access control method based on roles and user trustworthiness is proposed,which achieves encrypted electronic archive files in different purposes of secure access in demanding occasions,and through the policy-based chameleon hash function,the flexible modification of access policies is realized.Compared with some traditional access control methods,this method can ensure the secure access and multi-party collaboration of archive data in various demand scenarios.4.Developed a full-featured archival information management system based on blockchain cloud platform,which realizes secure storage,trusted access and efficient management.Aiming at the current problems in digital archives management and the defects of the existing archives information management platform,this thesis proposes a comprehensive security technology solution for archives information management,and designs and implements a new set of blockchain-based cloud platform.The file information management system effectively guarantees the security of digital files.