Abstract:In MANET, each node is needed to maintain its location information with the neighbor nodes for geographic routing. For this purpose they transmit the beacon packet periodically, which is not efficient in geographic routing due to packet collision. Also it has its effects in terms of update cost. Further the inaccuracy in local topology has its impact on the performance geographic routing. To overcome this in this paper we introduce the prediction scheme for Beacon Update and a prediction Scheme for Link Expiration Time. For geographic routing we use Greedy Perimeter Stateless Routing (GRPS) Protocol with greedy techniques, which select its next hop based on the optimization criteria. When greedy fails in selecting the next node nearest to destination we use perimeter rule which search over the perimeter of the node for destination node. Using the Mobility prediction scheme for Beacon technique in GPSR we try to decrease the update cost and increase accuracy of local topology.

Anonymous routing schemes in MANETs can be classified into on-demand or reactive routing methods, proactive routing methods and anonymous middleware routing method. A finer classification of reactive routing methods includes hop-byhop encryption and redundant traffic routing which either generate high cost or cannot provide full anonymity protection to data sources, destinations, and routes. An Anonymous Location-based Efficient Routing protocol (ALERT) was used to offer high anonymity protection at a low cost. Like other anonymity routing algorithms, ALERT is not completely bulletproof to all attacks. To prevent the occurrence of stronger and active attackers, we propose a Secure Cryptographic Based Mix-Zones Routing Protocol (SCMIX).The idea for mix-zones is to prevent the adversary from accessing the content of messages, including the Node's signatures. All legitimate nodes within the mix-zone obtain a symmetric key and utilize this key to encrypt all their messages while within the zone.