Mobile Agent Based Routing Protocol with Security for MANET

A mobile ad hoc network (MANET) consists of a set of mobile hosts. The mobile hosts are capable of communicating with each other without the assistance of base stations. The nodes of a MANET intercommunicate through singlehop and multihop paths in a peer to peer form. Intermediate nodes between two pairs of communication nodes act as routers. Mobile agent is a program segment which is self controlling. They navigate from node to node not only transmitting data but also doing computation. They are an effective paradigm for distributed applications, and especially attractive in a dynamic network environment. A routing algorithm with multiple constraints is proposed based on mobile agents. It uses mobile agents to collect information of all mobile nodes. The algorithm has stronger routing stability and lower probability of link failure because it selects links withlarge link expiration time. Multipath strategy reduces the time consumption of rerouting. Also, the source node can utilize the best path to perform the data transmission to meet two QoS requirements (remaining battery and bandwidth) in order to extend the survival time of network. The mobile agent based routing algorithm is more effective and robust than AODV. The mobile agent multiple constraint based routing scheme is enhanced with security and access control features. The mobile agents have no security mechanism and access control. The authentication scheme is used to permit mobile agents to perform computations. The RSA algorithm is used for the security process. The system improves the QoS factors with bandwidth and energy consideration. The mobile agents are developed using the Aglet.