Enhancing security of MAC protocol in MANET using trust based engine

The transfer to wireless network form wired network has been a worldwide trend within the past years. Among all the up to date wireless networks, Mobile Ad hoc Network is one of the necessary and separate application. To achieve the diversity gains, cooperative communication utilizes nearby terminals to relay the overhearing information, has a great potential to improve the transmitting efficiency in wireless networks. Here, we had developed a trust based engine based on a MAC-layer approach which attains confidentiality and authentication of packets in both routing and link layers of Mobile ad hoc networks using FSM. In the first Step of machine, we design a CTS, RTS, Receiver model for detecting and separate the malicious nodes using Finite state machine. This estimation considers the differences among various packet delay and collision are solved using RTS, CTS, &Back off mechanism. These differences are employed to achieve a more accurate estimation. Finally, the proposed model and estimations are implemented and validated by Finite State Machine (FSM).