Scalable secure and cost effectiveKey agreement protocol for dynamicPeer groups

Abstract

As result of the increased popularity of group oriented newlineapplications and protocols group communication occurs in many different newlinesettings from network layer multicasting to application layer tele and video newlineconferencing Regardless of the underlying environment security services are newlinenecessary to provide communication privacy and integrity While peer to peer newlinesecurity is a mature and well developed field secure group communication newlineremains relatively unexplored newlineMany multicast security problems are closely related to core key newlinemanagement and distribution problems There are certain multicast security newlinearchitectures available in the literature based on centralized decentralized and newlinedistributed approaches However there is no single method that can consider newlineall the issues like single point failure dependence on the routing protocol newlineexponential increase of computational costincreased overheads due to newlinemembership dynamism complex key distribution mechanism less scalability newlineand finally inefficiency due to rekey updates To resolve the above issues in newlinethis thesis a hybrid approach system is proposed This system is called Hybrid newlineRekeyingMechanism HRM and it consists of the following three parts newlineOne way function tree with Iolus as a base newlineInterval based Cost effective Key Agreement Protocol ICKAP newlineto reduce re keying complexity and newlineEnhanced security infrastructure newline