Abstract:
A Mobile Ad-Hoc Network (MANET) is defined as an arrangement of wireless mobile nodes
which creates a temporary network for the communication. MANET doesn’t having any access
point. Due to high availability of wireless devices infrastructure-less networks are using
everyday’s life. MANET is suffering from two different kinds of attacks, active and passive
attacks at all the layers of network model. The lack in security measures of their routing
protocols is number of attackers to intrude the network. Wormhole, attack is generated by
tunnels creation and it results in complete disruption of routing paths on MANET. Proposed
system is a security approach to detect and mitigate wormhole attack.It is secured AODV
approach which efficiently find wormhole attack which is present in given MANET and Digital
signature is used to stop it. It calculates the all over tunneling time taken by tunnel to analyze the
behavior of wormhole.After that it decides some static threshold value.Based upon this tunneling
time and threshold value, it will decide whether given node is wormhole node or trustworthy
node.After that apply digital signature and hash chain algorithm to remove wormhole node. It is
one of the secured solution because it uses Hash function to prevent wormhole attcack.
