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Authenticated Key Agreement in Group Settings |
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| Authors: | LI Ming WANG Yong GU Da-wu BAI Ying-cai |
| Affiliation: | Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;School of Software, Beijing Institute of Technology, Beijing 100081, China;Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China;Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China |
| Abstract: | An enhanced definition of implicit key authentication and a secure group key agreement scheme from pairings are presented. This scheme combines the merits of group public key and key trees to achieve a communication-efficient and authenticated group key agreement protocol. Besides, it avoids dependence on signature or MAC by involving member's long-term keys and short-term keys in the group key. Furthermore, the idea behind this design can be employed as a general approach to extend the authenticated two-party Diffie-Hellman protocols to group settings. |
| Keywords: | key agreement implicit key authentication key tree pairings |
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