International Journal on Computer Science and Technology (IJCST)
Cloud computing is the newest term for the ong-dreamed vision of computing as a utility. The cloud provides convenient, on-demand network access to a centralized pool of configurable computing resources that can be rapidly deployed with great efficiency and minimal management overhead. The industry leaders and customers have wide-ranging expectations for cloud computing in which security concerns remain a major aspect. Security services such as Intrusion Detection System (IDS), Anti-Virus software, Anti-Spam software and Distributed Denial of Service (DDoS) are used in general cloud-based security overlay network that acts as a transparent overlay network.