A Survey on Cloud Computing

Cloud computing technology is the way to provide everything to clients as services through internet connection. Using this technology the clients would be able to rent the required services via web browsers. This study gives a proper definition to cloud computing, highlighted the related technologies, the essential characteristics, cloud architecture and components. Comparison among three service models (SaaS, PaaS, and IaaS) as well as deployment models: private, public, and community cloud has been given. Furthermore, the chapter includes information security requirements of public and private cloud according to different service models. The aim of this chapter is to giving the researchers a clear vision about this technology and the information security requirements for private and public cloud as well as the main security issues for future researches.