Security Issues in Cloud Computing and their Solutions: A Review <s> VII. <s> Abstract Cloud Computing trend is rapidly increasing that has an technology connection with Grid Computing, Utility Computing, Distributed Computing. Cloud service providers such as Amazon IBM, Google's Application, Microsoft Azure etc., provide the users in developing applications in cloud environment and to access them from anywhere. Cloud data are stored and accessed in a remote server with the help of services provided by cloud service providers. Providing security is a major concern as the data is transmitted to the remote server over a channel (internet). Before implementing Cloud Computing in an organization, security challenges needs to be addressed first. In this paper, we highlight data related security challenges in cloud based environment and solutions to overcome. <s> BIB001 </s> Security Issues in Cloud Computing and their Solutions: A Review <s> VII. <s> Cloud computing is an emerging technology has grown a lot for virtualization and provides many services over the internet such as software as a service, platform as a service, infrastructure as a service and many more services which reduce the cost expenses and operating expenses. Now by using these services, data can store online in the cloud, then automatically a security concern will arise about data. Many protection techniques have been proposed till now. The best options available is encrypting the data before storing in third party cloud database and again decrypt the data after retrieving from the cloud. We introduce a more economical and robust encryption technique which allows a third-party cloud server to shield user data more expeditiously. <s> BIB002
DATA ENCRYPTION Encryption is said to be a better approach regarding data security. Data should be encrypted before sending it to cloud. Data owner can permit some particular members to have access to that data BIB001 . The file or data being sent to cloud should be encrypted first then before storing it on cloud it should be again encrypted by the cloud provider; the process is known as multistage encryption. It has been observed that combination of different encryption algorithms provides better encryption on data. Experimental results show that RSA+IDEA gives the higher performance of encryption in securing the data BIB002 .