Detecting and avoiding of collaborative black hole attack on MANET using trusted AODV routing algorithm

A mobile ad-hoc network (MANET) is a wireless network such that nodes are move dynamically in network. In network layer so many attacks but introduce only collaborative black hole attack a group of black hole node easily employed against routing in mobile ad-hock networks called collaborative black hole attack. In this paper we introduce trusted AODV routing protocol which trust value calculate using tangent hyperbolic function. The result shows performance improvement as compared to standard AODV protocol.