“…The main concept of cloud computing is to provide services in real-time according to users' demands by sharing hardware resources and software programs. In recent years, there have been many well-known companies involved in the field of cloud computing, such as Google, IBM, Microsoft, Yahoo, and Amazon [3,4,[10][11][12]. Google, the number one Internet search engine in the US, utilizes the concept of cloud computing a long time ago on its own services, such as Gmail, YouTube, Google Docs, Google Talk, Google Calendar, and Google Gadget, etc.…”