In this paper we present an analysis of Shaft, an example of malware used in distributed denial of service (DDoS) attacks. This relatively recent occurrence combines well-known denial of service attacks (such as TCP SYN flood, smurf, and UDP flood) with a distributed and coordinated approach to create a powerful program, capable of slowing network communications to a grinding halt. Denial of se...

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...

Denial-of-service (DoS) attacks pose an increasing threat to today’s Internet. One major difficulty to defend against Distributed Denial-of-service attack is that attackers often use fake, or spoofed IP addresses as the IP source address. Probabilistic packet marking algorithm (PPM), allows the victim to trace back the appropriate origin of spoofed IP source address to disguise the true origin....

With the development of network, the issues of network security are rapidly becoming a serious problem, and the Denial of Service (DoS) attack has already become the greatest threat to the network. SYN Flood attack is one of the most common distributed denial of service attack way (DDoS). This paper presents an improved SYN Cookie method, designing a novel attack detector processing and a enhan...

Distributed Denial Of Service (DDoS) attacks are familiar threats to Internet users for more than ten years. Such attacks are carried out by a “Bot net”, an army of zombie hosts spread around the Internet, that overwhelm the bandwidth toward their victim Web server, by sending traffic upon command. This paper introduces WDA, a novel architecture to attenuate the DDoS attacker’s bandwidth. WDA i...

Denial-of-Service (DDoS) attack is a serious threat in Internet. We propose a bit marking concept to identify and drop the DDoS attack packets. Bit marking is a variation of the packet marking technique that modifies packet headers at each router. However instead of storing the router information in the packets, bit marking alters one or more bits in the marking field. The bit marking process d...

The Distributed Denial-of-Service attack is a serious threat in Internet and an effective method is needed for distinguishing the attack traffic from the legitimate traffic. We propose the concept of bit marking to identify and drop the attack packets. Bit marking is a variation of packet marking technique that modifies the packet header at each router. However bit marking differs from packet m...

2 Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks have increased in number. Take note: saying THAT would be a gross understatement. Back in the comfortable past, only people with specialized knowledge and a good amount of resources were able to launch such high-end attacks. Today, anyone with access to the Internet and minimal technical know-how can very well execute an...

The problem of identifying Distributed Denial of Service (DDoS) is one of the hardest threats in the internet security. It is important to protect the resource and trace from the Denial of Service (DoS) attack, but it is difficult to distinguish normal traffic and DoS attack traffic because the DoS generally hide their identities/origins. Especially the attackers often use incorrect or spoofed ...

Concerns about security on Internet of Things (IoT) cover data privacy and integrity, access control, and availability. IoT abuse in distributed denial of service attacks is a major issue, as typical IoT devices' limited computing, communications, and power resources are prioritized in implementing functionality rather than security features. Incidents involving attacks have been reported, but ...