Introduction

Cloud computing has become the most important terminology in the computing sphere. It has reduced the effort and cost required to set up and operate the overall computing infrastructure. It has helped various businesses quickly start their business operations without wasting time planning their IT infrastructure, and has enabled really small teams to scale their businesses with on-demand computing power.

The term cloud is commonly used to refer to a large network of servers connected to the Internet. These servers offer a wide range of services and are available for the general public on a pay-per-use basis. Most cloud resources are available in the form of Software as a Service (SaaS), Platform as a Service (PaaS), or Infrastructure as a Service (IaaS). A SaaS is a software system hosted in the cloud. These systems are generally maintained by large organizations; a well-known example that we commonly use is Gmail and the Google Docs service. The end user can access these application...