International Journal of Computer Science and Information Technologies
Cloud computing delivers the computing resources to the user as a service over an internet. It uses wireless services with a user's data, software and computation. So spreader over almost all IT sector and become a rich area of research. Cloud computing composes of virtualization, on demand deployment. Here user has to pay for the application on which they want. So extensive and effective cloud security is provided by using Digital certificate to ensure the correctness of data, as the number of users increases cloud server may busy and failure to provide the services to the users, volunteer computing can be used to maintain the load balance of a cloud server.