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Authenticated Group Key Transfer Protocol Based on Secret Sharing

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2 Author(s)
Harn, L. ; Dept. of Comput. Sci. Electr. Eng., Univ. of Missouri-Kansas City, Kansas City, MO, USA ; Changlu Lin

Key transfer protocols rely on a mutually trusted key generation center (KGC) to select session keys and transport session keys to all communication entities secretly. Most often, KGC encrypts session keys under another secret key shared with each entity during registration. In this paper, we 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 cannot recover the group key. The confidentiality of this transformation is information theoretically secure. We also provide authentication for transporting this group key. Goals and security threats of our proposed group key transfer protocol will be analyzed in detail.

Published in:

Computers, IEEE Transactions on  (Volume:59 ,  Issue: 6 )