The significance of the DDOS problem and the increased occurrence, sophistication and strength of attacks has led to the dawn of numerous prevention algorithms. Each proposed prevention algorithms has some unique advantages and dis advantages over the others. In this paper, we present a classification of available algorithms that are proposed in literature on preventing internet services from p...

Distributed denial of service (DDoS) is considered as one of the most serious threats to emerging cloud computing infrastructures. It aims at denying access to the cloud infrastructure by making it unavailable to its users. This can cause important economic and organizational damage depending on the type of applications running on the cloud that have become unavailable. This paper proposes an e...

Smart Grid (SG) poses operational and business challenges for energy suppliers and utility companies that are readily met by Cloud Computing (CC). Given the distributed nature of SG and CC it is inevitable that the two technologies will become integrated. In this paper we discuss the risks and opportunities that CC presents to energy suppliers and utility companies, and consider what inherent a...

A distributed denial-of-service (DDoS) attack is carried out by simultaneously by compromised systems against targets causing system and service unavailability. Regardless of industry and size, companies worldwide are increasingly becoming target of DDOS attacks. The sophistication and intensity of these attacks are exponentially rising due to increase in number of compromised systems, unpatche...

Executive Summary Distributed Denial of Service (DDoS) attacks are a major cause of disruption for networks and the distributed applications they host. With enhancements of routers and intermediate network devices and appliances, the level of attention given to DDoS attacks has reduced over time, as they have been viewed as less of a security issue. These traditional volumetric attacks were oft...

Distributed denial-of-service (DDoS) attacks are one of the key threats and perhaps the toughest security problem for today’s Internet.Distributed Denial of Service (DDoS) attack has become a stimulating problem to the availability of resources in computer networks.With brief or no advance warning, a DDoS attack can easily drain the computing and communication resources of its victim within a s...

Distributed Denial-of-Service attack (DDoS) is one of the most outstanding menaces on the Internet. A DDoS attack generally attempts to overwhelm the victim in order to deny their services to legitimate users. A number of approaches have been proposed for defending against DDoS attacks accurately in real time. However, existing schemes have limits in terms of detection accuracy and delay if the...

Software Defined Networking (SDN) is a new network architecture that separates the control plane and the data plane and provides logically central control over the whole network. Because SDN controller combines the upper application layer and the underlying infrastructure layer, it may face the problem of single-point failure. If it is made unreachable by a Distributed Denial of Service (DDoS) ...

The growth of web technology has brought convenience to our life, since it has become the most important communication channel. However, now this merit is threatened by complicated network-based attacks, such as denial of service (DoS) and distributed denial of service (DDoS) attacks. Despite many researchers' efforts, no optimal solution that addresses all sorts of HTTP DoS/DDoS attacks is on ...

Recently high-speed networks have been utilized by attackers as Distributed Denial of Service (DDoS) attack infrastructure. Services on high-speed networks also have been attacked by successive waves of the DDoS attacks. How to sensitively and accurately detect the attack traffic, and quickly filter out the attack packets are still the major challenges in DDoS defense. Unfortunately most curren...