Abstract
Distributed Denial of Service (DDoS) attack is a complex security challenge for growth of Cloud Computing. DDoS attack is very easy to apply, difficult to prevent and hard to identify because attacker can spoof the IP address of itself for hiding the identity of himself. In this paper, we present a Third Party Auditor (TPA) based efficient DDoS detection and prevention technique which has the strong identifi- cation factor based on these weaknesses. It has less overhead at the user end. Thus, we target various aspects of prevention of DDoS attack in the Cloud environment.