The Design And Implementation Of WDCFS Distributed Encrypted File Storage System

With the development of the big data field,efficient and secure storage of massive data is becoming more and more important.Distributed secure storage technology,which integrates distributed storage technology and data encryption technology,has the characteristics of security and mass storage,and has become one of the focus in the field of information security.In distributed storage technology,the selection of storage nodes is a key issue.Whether the selected node is reasonable or not will affect the performance of the system and the effective utilization of storage capacity.After studying the existing node selection algorithms,this paper proposes a more efficient algorithm—node selection algorithm based on multi-attribute decision-making.This algorithm can better consider the storage capacity and real-time load of the server without monitoring the storage server.Compared with the existing algorithms,this algorithm not only makes the storage cluster run more stable,but also makes full use of the storage capacity,with better balance and scalability.Based on the proposed storage node selection algorithm,this paper designs and implements a distributed encrypted file storage system WDCFS(Web DAV Distributed Cryptographic File System)based on the Web DAV protocol.The system consists of user authentication module,audit management module,file processing module,distributed storage module and key management module.After the user logs in at the client,the system will automatically mount the network disk in the resource manager to provide the user with a distributed ciphertext file operation interface consistent with the operation of local files.The file data is transmitted to the server based on Web DAV protocol.After the server encrypts and splits the file content,it uses the node selection algorithm proposed in this paper to store the data to the selected nodes in the server cluster.The function and performance test results of the WDCFS system show that the system functions correctly,runs efficiently,safely and easily,and has good scalability.