Techniques for resilience of Denial of service Attacks in Mobile Ad Hoc Networks
Syed Atiya Begum · 2012
Abstract- A mobile ad-hoc network (MANET) is a self-configuring infrastructureless network of mobile devices connected by wireless links. Ad hoc is Latin and means "for this purpose”. Each device in a MANET is free to move independently in any direction, and will therefore change its links to other devices frequently. 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 intended users. A Denial-of-service attack is a type of security breach that prohibits a user from accessing normally provided services. The denial of service (DOS) does not result in information theft or any kind of information loss but can nonetheless be very dangerous, as it can cost the target person a large amount of time and money. Denial-of-service attacks affect the destination rather than a data packet or router. Significant progress has been made towards making ad hoc networks secure and DoS resilient. In this paper, we study DoS attacks in order to assess the damage that difficult-to-detect attackers can cause. The first attack we study, called the JellyFish attack, is targeted against closed-loop flows such as TCP; although protocol compliant, it has devastating effects. The second is the Black Hole attack, which has effects similar to the JellyFish, but on open-loop flows. The interesting point to note here is DoS attacks can increase the capacity of ad hoc networks, as they starve multi-hop flows and only allow one-hop communication, a capacitymaximizing, yet clearly undesirable situation. Later in this paper we study different techniques to protect our ad hoc networks against these denial-of-service attacks. The