International Journal of Computer Science Issues
In IaaS services of cloud the customers demand for hardware resources as a service like memory, processor cycles, disk storage even software. IaaS services of cloud rely heavily on virtualization. The service is provided by means of virtual machine. It is not easy task for cloud users to store their valuable data over cloud because of matter of trust over cloud. Data integrity in cloud environment is ensured by the security of virtual machines. Recent survey shows the security is one of the primary concerns in adoption of cloud.