Review of Rushing Attack in Manets

Mobile Ad Hoc Network is a collection of multihop wireless mobile node that communicates with each other without centralized control. Each node in MANETs act as both router as well as host. Security is the most challengeable task in MANETs. MANET is vulnerable to various kinds of network attacks such as black hole attack, grey hole attack, worm hole attack, rushing attack, Sybil, flooding attack, link spoofing, packet dropping attack, location disclosure etc. On-demand routing protocols in ad hoc networks were not originally designed to deal with security threats ,so as to malicious users have been searching ways to attack networks. Rushing attacks represent one of such possibilities. In these attacks, malicious nodes forward the Route Request (RREQ) packets, asking for a route, to the destination node faster than the legitimate nodes do. This is possible because the legitimate nodes only forward the first received RREQ packet for a given route discovery. Moreover, the attackers can tamper with either the medium access control or routing protocols to get quicker processing. As a result, the path through the malicious nodes is chosen, which renders throughput degradation.