Security management in hierarchical ad hoc network

Mobile ad hoc networking (MANET) is an infrastructureless network composing many hosts moving in arbitrary manner. Due to the unpredictable and dynamic environments, the MANET networks have much more restricted security requirements than the traditional wired-and-static networks. Although a security model based on CA (certification authority) has been implemented to make the security goal achievable, there are still problems can not be avoided, such as the "bottleneck" of CA. Moreover the CA mechanism also violates the robustness of the wireless system. In this paper, we present common security problems related to routing, and discuss contemporary solutions that are seemingly inadequate for protecting the routing in MANET networks. As a result, we deliver a security-policy based on hierarchical routing. It not only provides the robustness of the network and eliminates the "bottleneck" in the system, but also complies with the organization system especially in the army