Cloud computing is heralded as the pressing future of computing. In fact, in many ways, cloud computing is already here, and has been for some time. The most obvious example of cloud computing is Google Mail. Cloud computing, simply defined, is the implementation of computing services that use shared hardware, shared software, and in many cases even shared information. Google Mail, for example, makes email services available using a widespread, highly redundant network of systems that removes the same functionality and data from the user's computer, putting it "in the cloud" where it can be retrieved as needed - from any enabled device such as a smartphone, a computer or an Internet kiosk. Cloud computing is a bit like the first computers closing the circle: in the early days of computing, users of terminals without computing power used the number - exploit the capabilities of the mainframes in a shared way - in fact, the usage model of the computer was called “time-sharing”. As the personal computer grew in power and capability, it also became affordable...