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ABSTRACT

Traditional routing protocols deployed to provide communication among mobile nodes in wireless ad hoc networks (MANET) assume a trust and collaborating environment inside the network. However, this assumption is not always true and a hostile or unprotected environment can seriously affect the protocol and network performance. In this work two kinds of approaches are applied to a well-known routing protocol called SAODV in order to improve its performance and to offer more resilience to attack from malicious nodes authenticated by the network. A preventive approach based on a cryptographic mechanism and a reactive approach to detect the anomalous and malicious behavior of nodes are considered. An extension of SAODV to offer Intrusion Detection mechanism (IDM) and trust-based mechanism (TBM) to promote the collaboration of the cooperating node and penalize the selfish nodes are proposed. Simulation results were performed in order to show the effectiveness of our proposal in comparison with AODV and SAODV.

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INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.3 Network Operations

General Terms:
Security

Keywords:
MANET, SAODV, intrusion detection, security