A System of Umpires for Security of Wireless Mobile Ad Hoc Network

A mobile ad hoc network (MANET) is a self-created self-organized and self-administering set of nodes connected via wireless links without the aid of any fixed infrastructure or centralized administrator. Protecting the network layer from malicious attacks is an important and challenging issue in both wired and wireless networks and the issue becomes even more challenging in the case of MANET. In this paper we propose a solution of umpiring system (US) that provides security for routing and data forwarding operations. Umpiring system consist of three models, are single umpiring system (SUS), double umpiring system (DUS), and triple umpiring system (TUS). In our system each node in the path from source to destination has dual roles to perform: packet forwarding and umpiring.US does not apply any cryptographic techniques on the routing and packet forwarding message. In the umpiring role, each node in the path closely monitors the behavior of its succeeding node and if any misbehavior is noticed immediately flags off the guilty node. For demonstration, we have implemented the umpiring system by modifying the popular AODV protocol.