Secure access for MANET using authorization enforcement facility

As MANETs are highly vulnerable to attacks due to its dynamic infrastructure, there may occur several attacks. Among those attacks routing attack is the most severe one. To systematically cope up with this routing attack, Risk Aware Response Mechanism is used. In these mechanism IDS is used which detects malicious activities caused by malicious nodes, Based on the risk of attack, temporary decision is made whether isolation is needed or not. IDS used in risk aware response mechanism is static based approach. Hence rule set in IDS has to be updated often by the network administrator if there are any new emerging attacks. In this paper, we propose a Authorization Enforcement Facility which uses risk as an input to determine how much a source node can be trusted. AEF considers both static approach as well as dynamic conditions in order to achieve better security and allow only secure communication to takes place between source and destination.