International Journal of Innovative Research in Science, Engineering and Technology (IJIRSET)
Cloud is growing technology for enabling on demand access to a shared pool of configurable server resources with infrastructure that can be rapidly provisioned and released with minimal management efforts. Cloud computing runs the application software and databases to the huge data centers in which the management of the data and services may be fully untrusted. This unique attribute poses a lot of new security challenges which have not been well understood. It focuses on cloud data storage security, which has always been an important characteristic of quality of service.