In recent years, Cloud Computing has emerged as a new paradigm in the field of networkbased
services within many industrial and application domains. It offers a pool of virtualized
computing resources at various levels, covering infrastructure, platforms or software delivered
to users as on-demand services from the cloud, or Business Processes as Service
(http://www.gartner.com/it-glossary/business-process-as-a-service-bpaas), i.e. from a
network that ensures resources and services. In this way, Cloud Computing is changing the
services consumption and delivery platform as well as the way businesses and users interact
with IT resources