Multicast services grow up quickly and thus they urgently call for a secure mechanism to provide the\nconfidentiality and privacy of communications. Recently, multicast issues in Proxy Mobile IPv6 (PMIPv6) networks have\ngenerated a great deal of interest among researchers, and several multicast schemes had been proposed. However, these\nschemes do not take security issues into account. In an attempt to fill that research gap, we propose a dual multicast key\nmanagement scheme for secure group communications in PMIPv6-based Long Term Evolution (LTE) networks. This scheme\nsatisfies the requirements for forward and backward secrecy. Moreover, the performance analysis demonstrates that the\nproposed scheme incurs low communication and storage costs. Finally, we provide guidelines for Internet service providers\n(ISPs) to select the suitable multicast key management architecture.
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