Cloud computing is an evolution of computer technology and a dominant business model for delivering information technology (IT) infrastructure, components, and applications. With cloud computing, a product-centric model for IT provisioning is transformed into a global, distributed, service-centric model, leading to a disruptive shift from IT-as-a-product to IT-as-a-service [4, 24]. Cloud computing enables individuals and organizations to access IT resources on-demand, from any platform or device at any time as a measured service [32]. Cloud providers offer an everincreasing number and variety of services that are built on a shared pool of computing resources and able to elastically scale to growing computing demands. Market researchers predict the public cloud market to hit US $236 billion by 2020, a growth of 23 percent from 2014 [16]. Defying initial concerns, the move toward cloud computing proceeds with …
