Universiti Teknikal Malaysia Melaka
Cloud computing is a revolution in IT technology by providing a shared pool of virtualizes resources for its users to pay as they use. This technology is based on two crucial concepts as virtualization and abstraction, which increased the ability of on demand access through the available resources in the cloud without any investment in new infrastructure. Security is one of the most challenges for both cloud provider and cloud consumer. In recent years DDoS attack is one of the most serious threats against cloud computing.