Optimal Shared Multicast Tree based solution for Group Key Management in mobile IPv6

The multicast technologies are increasingly used as an efficient communication mechanisms for group-oriented applications in the Internet. To follow this progress, Internet research community proposed many multicast routing protocols to support efficiently multimedia applications group-based such as IPTV, videoconferencing, group games. However, these multicast routing protocols doesn't designed natively for mobile multicast 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 fixed. In addition to mobility issues, multicast applications suffer from several problems related to the confidentiality of 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 with efficient group key management 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. 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 1-affect-n phenomenon and encrypt/decrypt operations.