Secure Decentralized Group Key Management through Progressive Approach

Abstract

ABSTRACT Multicast routing protocols are widely used as efficient communication methods for Group-oriented applications. Decentralized system is preferred to improve bandwidth economization. However, security with the key management for such protocols re-mains a significant problem. In this paper, a secure group key agreement over decentralized systems is proposed. The proposed system is based on the use of progressive approach which is a step by step improvement process. The main advantage of our proposed system is the periodic Authentication of group key members. Index Terms — Multicast, Cryptography, Group Key Management, RMTP, Progressive Approach. 1. INTRODUCTION Many applications, such as digital media distribution Pay-per view, teleconferencing, multiparty video games, military application and cooperation in a network and software updates, use multicast services. However, an increasing number of such applications require secure multicast services in order to control the Group Members (GM) in a secure way. Group Key Management (GKM) helps to achieve security in multicasting information over group-oriented environments. In order to multicast information among a certain group securely, a Group Key (GK) should be shared among all members in this group. Every information packages should be encrypted with the shared Group Key (GK) before they are transmitted. Only the authorized users who have the shared common Group Key (GK) can decrypt the package and get the information. The unauthorized users perhaps received the encrypted packages; they can't get the information without the Group Key (GK). So the communications among these members in the group are secure