International Journal of Computer Applications
Cloud computing has become one of the most demanding services over the internet. It has gained remarkable fame for past few years. But it is under the severe threats of internet security. One of the severe threats is Distributed Denial of Service (DDoS). DDoS occurs when a huge amount of packets are sent to a server from various computers. Botnet is one of the major causes that launch DDoS attack. Botnet is actually a network of bots or zombie computers that are under the control of attacker.