Nowadays companies are increasingly adopting the technology ofcloud computing. This technology is subject to a lot of research and continuousadvances are made. The use of cloud computing in the companies advantagessuch as: reducing costs, sharing and exchange of information between institutions,but the data in the Cloud computing are susceptible to be compromisedand the companies are exposing to see their data loss. In this study, we addressthe subject of security in cloud computing; we expose and discuss someresearches that had been proposed to secure the data stored in the cloud. Andthen we will present our new frameworks that ensure confidentiality of datastorage in the cloud environment
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