OSM-GKM Optimal Shared Multicast-Based Solution for Group Key Management in Mobile IPv6

Abstract

In the last few years, multicasting is increasingly used as an efficient communication mechanism for group-oriented applications in the Internet. This progress has motivated Internet research community to propose many multicast routing protocols to support efficiently multimedia applications such as IPTV, videoconferencing, group games. However, these multicast routing protocols doesn’t designed for mobile members and sources, and has not tested in wireless and mobile environment since they were introduced for multicast parties whose members and sources are topologically stationary. In addition, multicast applications require confidentiality for transmitted data. Traffic encryption key is used to assure this confidentiality and has to be changed and distributed to all valid members whenever a membership change (join or leave) occurs in the group and members move from one network to another. Our goal aims to support secure group communications in mobile environments. This paper presents OSM-GKM a new scheme to secure a transparent multicast communication in mobile environment based on Optimal Shared Multicast tree protocol. Its contribution is twofold: first, we evoke transparent multicast routing in mobile IPv6. Second, we present an architecture topology to transmit keys to multicast members. The paper is concluded with simulation studies, which show that our architecture achieves better performance in terms of delay, variation delay and tree cost for rekeying process.