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Group key protocols are still an important research issue in the network security, generation and sharing the secret session key is the important factor during the group key transfer protocols. Usually it will be taken care of KGC. KGC encrypts session keys under another secret key shared with each entity during registration. In this paper, the authors propose an authenticated key transfer protocol based on secret sharing scheme that KGC can broadcast group key information to all group members at once and only authorized group members can recover the group key but unauthorized users can not recover the group key.
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