International Journal of Advanced Research in Computer Engineering & Technology
Cloud computing is a highly scalable distributed computing platform, and an emerging technology in IT industry, in which computing resources are offered 'As a service'. These services are categorized in three services Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS) and Infrastructure-as-a-Service (IaaS). The authors are free to access these services with some specific protocols. So these protocols are bind together and are put together into the form of license by service provider. To access these services, they require license, a legal authorization through which a cloud service provider authorized the user to use its resources on pay-per-basis and resources are provided on demand by the service provider.