In MANET mobile node is responsible for route establishment using wireless link where each node behave like both as a host and router. MANET encounter by number of security threat because of its open untrusted environment with little security arrangement, whether security over MANET is not to be enhance up to satisfactory level because of its characteristics. Among all of security threat worm hole is consider to be a very serious security threat over MANET. In worm hole two selfish nodes which are geographically very far away to each other, makes tunnel between each other to hide their actual location and try to believe that they are true neighbors and makes conversation through the wormhole tunnel.