User Data Security Mechanism For Cloud Storage

Cloud computing environment provides fast data storage and retrieval service for users bydepending on cloud storage system. Tremendous data of users is stored in cloud storage system,so its security is very important. In recent years, a lot of the telltale incidents happened in cloudstorage system show that there are more and more attacks to cloud storage, causing terrible threatto the data security of cloud users directly. The problem of data security has become one of themost important problems the development of cloud storage faced with. In order to meets theusers’ security requirements of protecting their important data when using cloud storage service,the protection mechanism for cloud storage system must be strengthened. The data security ofusers is guaranteed and the service requirement of users is satisfied by designing securityprotection mechanism of data and studying key technology of the mechanism which improvesthe service quality of cloud storage.The security mechanism of data for cloud storage users is established and two keytechnologies are studied by studying and analyzing the users’ data security problem in cloudstorage which ensures the confidentiality and integrity of users’ data. The data securitymechanism is tested by extending the platform of Cloudsim. The main works are as follows:1. A data security mechanism is designed for users and two key technologies of protectingthe confidentiality and integrity of data are proposed aimed at the security problem of users’ datain cloud storage. The process of data security access is provided and the procedure of protectingusers’ data is explained concretely.2. A cloud data confidentiality protection method based on MDS matrix has been offered.The confidentiality of users’ data is studied in cloud storage, and a secret distributed storagescheme is designed based on MDS matrix "recoverable" characteristic, the security of thisscheme is validated in theory; An efficient MDS matrix construction algorithm is proposedwhich improves the efficiency and ensures the practicability of this whole scheme.3. A cloud data integrity verification method based on bilinear pairings is offered. Anintegrity verification algorithm is designed for cloud data based on bilinear pairings, whichneither needs to conserve the data backup nor needs to compute all epibolic documents so that itcan provide countless integrity verification to users’ access on the premise of disclosing users’privacy information.4. Simulation experiments verification is conducted for data security mechanism byutilizing cloud computing simulation facility of CloudSim. The platform of CloudSim is extended to realize the data security mechanism of cloud storage users,experiment simulationand comparing analysis is conducted based on extended CloudSim.The simulation experimentsshow that data security mechanism which proposed in this paper owns the advantage of goodavailability and has little effect on the efficiency of cloud users’ data access.