Integrating trust reasonings into node behavior in olsr

In ad hoc networks, route discovery and maintenance introduce specific security problems for routing protocols to prevent, detect or respond. For the OLSR routing protocol, the correct routing operation requires an expected node behavior regarding the cooperation for discovering neighbors, selecting routers and announcing topology information, but the protocol lacks the means to verify this expected behavior. In this paper, we propose for OLSR the integration of trust reasonings into each node behavior, so as to allow a self-organized trust-based control to help nodes to detect misbehavior attacks. These reasonings are based on the idea that each node should mistrust received information and has to verify their validity. Our analysis of the OLSR specification brings out the trust rules that characterize this protocol and allows us to express formally the trust-related properties that can be verified by each node to assess the correct behavior of the other nodes.