SOLSR: A Secure Link State Routing Protocol for Ad Hoc Networks

Mobile Ad hoc Netwoks(MANET)is a new networking paradigm for wireless hosts. Because of self-organi- zation, dynamic topology and openness of wireless links, the routing security in MANET is more seriously than in wired networks. Optimized Link State Routing(OLSR)is proposed by IETF's MANET Group at 2003. OLSR assumes that all nodes in the netwoks are all friendly, and if there exist some security problems, IPSes can solve it. But OLSR's packets are often broadcasted and IPsec provides end-to-end security, so relying on IPSec isn't enough. Due to some existing defects, OLSR may not work if malicious nodes attack against routing. In this paper, we first analyze the OL- SR's security, then propose a solution to secure OLSR -- SOLSR, which strengthenes the neighbor relationship estab- lishment, applies the worm-detective mechanism and autheetication, and protects routing information.