The secured OLSR protocol for MANET

The Optimized Link State Routing is a table-driven link state routing protocol for Mobile Ad hoc Network. It uses the Multipoint Relays as a mechanism for flooding of control and traffic messages into the network. The design of protocol by RFC does not consider the security issues. The various authentication and encryption techniques help to secure this protocol against attacks from outside intruders. The secured OLSR framework consists of security module which provides the security with minimum overhead. The overhead is reduced by minimizing the number of Multipoint Relay nodes in the network and providing security for those selected nodes. The security is based on threshold cryptography technique. The use of threshold cryptography is to ensure security services by distributing the secret key shares and performing encryption with those shares of secrets. The destination could recover only if all the secret shares are not compromised. The main aim is to provide the integrity of routing messages, especially Topology Control messages and hence prevent intermediate nodes from altering routing messages while forwarding them. The simulations results also confirm above claims.