Research On File Segmentation And Encryption Technology For Cloud Storage

With the rapid development of cloud computing,big data,Internet of Things and other technologies,the amount of global information data is expanding rapidly,and storing data in the cloud has become an inevitable trend.Cloud storage is a new type of network storage technology expanded on it,which has the characteristics of strong scalability,high cost performance,and good maintainability.However,the current data security problem of cloud storage is still a big challenge.Users need to face the dual risks that cloud service providers,as data managers,may actively or passively leak user private data.Therefore,under the risk of untrustworthy cloud storage service providers,a security study of split encryption transmission technology is conducted for cloud data,and an auxiliary encryption algorithm model is proposed in which the ciphertext is divided twice and encrypted by obfuscation.Firstly,it is verified that file segmentation can optimize the effectiveness of transmission and storage in the cloud storage system,then based on the idea of data segmentation,it is proposed to reorganize the file with twice-segmentation and obfuscation to reduce the amount of effective information in the file,and finally,these reassembled file blocks are encoded by RS erasure code,so as to realize a fault-tolerant mechanism of forward error correction.According to the above research on file segmentation encryption transmission technology,a data security storage system based on mobile client for cloud data is designed and implemented.The system consists of two parts: the client and the server.The user’s direct operation of encrypting and transmitting files to the cloud on the client is the core of the entire system to ensure the safe transmission of data.The server is mainly responsible for authentication and management of related data and metadata.Firstly,the system provides mobile cloud storage services based on local clients.Secondly,the encryption measures sinking to the local client effectively ensure the opacity and security of user data in the cloud.Finally,based on file segmentation,the efficiency of file transmission and the probability of successful storage are effectively improved.