The latest and forth coming technology that all the organizations using today is Cloud Computing. Cloud Computing is the emerging technology because the data storage and retrieval for the users has become easy by using this technology. The data storage in the cloud has been a promising issue in these days. This is due to the fact that the users are storing their valuable data and information in the cloud. The users should trust the cloud service providers to provide security for their data. The cloud service providers also providing the security but not up to a complete level. The attack of malicious insiders into the cloud and to steal the data has been increased.