The wireless adhoc networks are highly vulnerable to distributed denial of service (DDoS) attacks because of its unique characteristics such as open network architecture and shared wireless medium. A denial-of-service attack (DoS attack) or distributed denial-of-service attack (DDoS attack) is an attempt to make a computer resource unavailable to its legitimate users. The denial of service (DOS...

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....

The phenomenal growth and success of Internet has changed the way traditional essential services such as banking, transportation, medicine, education and defence are operated. Now they are being progressively replaced by cheaper and more efficient Internet-based applications. In present era, the world is highly dependent on the Internet and it is considered as main infrastructure of the global ...