Research Of CA-Based Partially Distributed Authentication For Ad Hoc Network

Ad hoc network is a collection of mobile computing devices that communicate by using wireless links, forming dynamically a wireless network without the use of any static network infrastructure such as base stations. Such networks are useful in military and other tactical applications, e.g., emergency rescue or exploration missions, where cellular infrastructure is unavailable or unusable. Commercial applications are also likely where there is a need for ubiquitous communication services without the presence or use of a fixed infrastructure including on-the-fly conferencing applications, sensors, etc.Other than traditional network, Ad hoc network has no fixed infrastructure, so the centralized Certificate Authority services in fixed infrastructure networks are no longer suitable for this network. By introducing a policy of trust decentralization, we apply the thought of the cluster model and the probability weight rule into the partially distributed Authentication scheme to distribute the Certificate Authority services into the network .Then we simulate the clustering algorithm of partially signature probability. Compared with traditional partially distributed Authentication scheme, it adds the cluster head and common server nodes a distinct partially signature probability that reflects the security ranks. This scheme overcomes the limit of traditional Certificate Authority services which need trusted third party, the security and authentication efficiency of the system is enhanced as well.