Today, we have the ability to utilize scalable, distributed computing environment within the limits of the Internet, using a practice known as Cloud Computing. This phenomenon is generating a lot of interest worldwide because of its lower total cost of ownership, scalability, competitive differentiation, reduced complexity for customers, and faster and easier acquisition of services. While cloud offers several advantages, people come to the cloud computing topic from different points of view. The promise of providing interoperability in a heterogeneous world, as well as the possibility of...