Research On Data Storage And Sharing In Cloud Environment

Cloud storage is the provision of virtualized storage and related data services through the network.Users use storage space provided by cloud storage providers for easy data storage and sharing.The widespread use of cloud storage brings two major problems: First,network transmission becomes an efficiency bottleneck in transmission of large amounts of data;Second,users lose the absolute control of the data,resulting in security risks.In order to ensure cloud storage service security and reliability,cloud data should be encrypted.In this paper,data storage and sharing in the cloud environment are studied.This paper will focus on the cloud data encryption and encryption algorithms,as well as traceable and secure file sharing methods.In this paper,the basic principles of cloud storage and block chain are briefly introduced,and the current development of cloud storage is summarized.Then,this paper studies the data encryption storage model in cloud environment,and designs a block-chain-based data sharing model in cloud environment.According to this model,users are able to share with each other without trust center Data,as well as to track or revoke data authorization.In the end,this paper discusses the encryption algorithm of data in cloud storage,and improves the random access performance of the stream cipher algorithm.It reduces the time cost of data encryption or decryption and transmission,and improves the overall efficiency.The data sharing scheme designed in this paper has the features of decentralization and traceability of data authorization records,and revocation of authorization.The scheme of this paper does not need the absolutely trusted central authority,which avoids the security problem of key escrow.As the data authorization record is traceable,the data sharer can clearly check the sharing of data,review and account for the shared data,and withdraw in time after an exception has been identified.This scheme has good applicability in an environment that is not trusted,or in which the members change frequently.