No abstract

Mobile Ad hoc network comprises of many nodeswhich interact with each other through wireless links. It is infrastructure less in nature, due to which attackers can easily attack on the network from any side. There are many attacks which ruin the communication among the nodes of network. Among those attacks there is a Sybil attack that causes severe hazards to the network. Sybil attack is an attack which uses many identities at a time or one identity at a time. The identities used by Sybil attackers are either created by it or uses someone else's identity. This attack can decrease the trust of any legitimate node by using identity of that node and accumulate the secret or important data. Sybil attackers distribute secret data in other networks and it reduces the secrecy of network. In this way, Sybil attackers cause immeasurable loss to a network. In this research, Enhanced lightweight Sybil attack detection technique is discussed which is used to detect Sybil attack. Tool used for simulation is MATLAB.

Mobile ad-hoc network is a self-governing network, consists of group of nodes that communicates with each other through wireless links. As it is a wireless network, so it is subjected to various attacks. There is one attack which is very dangerous called Sybil attack. In Sybil attack, attackers or malicious nodes uses multiple identities to disrupt the communication between the nodes by capturing necessary and important information and creating misunderstandings between the nodes. In this paper some measures are described to prevent Sybil attack.

No abstract