Securing Cloud Availability Against DDOS Attack

Abstract

1.1 Introduction to Cloud Computing Cloud computing is a recently developing paradigm of distributed computing. Though, it is not a new idea that emerged just recently. In 1969 L. Klein Rock anticipated, “As of now, computer networks are still in their infancy. But as they grow up and become more sophisticated, we will probably see the spread of ‘computer utilities’ which, like present electric and telephone utilities, will service individual homes and offices across the country.” His vision was the true indication of today’s utility based computing paradigm. One of the giant steps towards this world was taken in mid 1990s when grid computing was first coined to allow consumers to obtain computing power on demand. The origin of cloud computing can be seen as an evolution of grid computing technologies. The term Cloud computing was given prominence first by Google’s CEO Eric Schmidt in late 2006 (May be he coined the term). So, the birth of Cloud computing is very recent phenomena although its root belongs to some old ideas with new business, technical and social perspectives. From the architectural point of view cloud is naturally build on an existing grid based architecture and uses the grid services and adds some technologies like virtualization and some business models.