New user authentication and key management scheme for secure data transmission in wireless mobile multicast

Due to the nature of multicast communication, security is an important challenge that needs to be addressed. It is of paramount importance that the confidentiality and authentication of messages transmitted between participating mobile nodes be maintained due to the sensitivity of the messages. This paper presents a high-level dual authentication scheme that would effectively prevent unauthorised users from participating in a multicast group communication. Secondly, one of the nature of users in a multicast communication is join and leave, this paper also proposes a dual group key management scheme to efficiently distribute a group key to a group of users and to update such group keys during the users' join and leave operations to prevent forward and backward secrecy. One of the major strengths of this scheme is that registration and deregistration of users can be achieved at a lower computational cost. The results of the proposed scheme promise a great deal of efficiency computationally compared to other existing schemes reviewed in the literature.