International Journal of Engineering and Technology

Cloud computing is the collection of networked computers sharing the resources on-demand. The increasing use of cloud computing over the globe has brought into focus a need to design a secure cloud storage system. For safe and satisfactory implementation of the same, there is a need to place emphasis on the problems arising in the same. The chief one is the unauthorized access which prevents data confidentiality. A secure cloud storage model guarantees security and robustness. The essential task is to encrypt the data before storing it for security purposes. This paper deals with the uncertainties of using centralized and de-centralized storage systems. It also explains the various encryption techniques used to prevent the information from eavesdropping.