GAKAP, multicast key agreement protocol for ad hoc networks based on group activity probability

We address the problem of multicast secure data over a multihop wireless ad hoc network. Many protocols that have been proposed are not really convenient for mobile ad hoc networks. We propose a group activity key agreement protocol (GAKAP) that aims to solve problems, such as mobility, unreliable links, and multihop communication cost, that are specific to ad hoc networks. The main idea is to focus on group dynamics and complete node mobility in the ad hoc environment to develop an adaptive protocol that is suitable for the network and group changes. Doing so, we extend and adapt the proposed tree based group Diffie-Hellman (TGDH) protocol to the pure mobile ad hoc network. We simulated our protocol over the Opnet environment under various mobility, group size, and group dynamic scenarios.