Bayesian network trust model for certificate revocation in ad hoc wireless networks

An Ad hoc wireless network has no infrastructure. It is formed dynamically by a group of moving nodes. There is no backbone or central point of communication. The media of communication is a shared wireless channel; hence extruders can easily penetrate through such a network. A distributed trust model is therefore employed to authenticate the nodes communicating in the network. Whenever a node observes a malicious activity, it floods an accusation in the network which is recorded in a certificate revocation list maintained in the local environment of each node in the network. The certificates for the nodes in the network are renewed if there is no entry against the node in the list. Hence, malicious nodes are removed from the network. However, this scheme has several drawbacks, the most important one being the removal of innocent nodes due to wrong accusations. This work proposes a Bayesian network trust model for certificate revocation. (Abstract shortened by UMI.)...