标题：Scalable authenticated dynamic group key agreement based on multi-tree
作者：Zhu, ZeQuan ;Xu, QiuLiang
作者机构：[Zhu, ZeQuan ;Xu, QiuLiang ] School of Computer Science and Technology, Shandong University, Jinan 250101, China
会议名称：3rd International Symposium on Electronic Commerce and Security, ISECS 2010
会议日期：29 July 2010 through 31 July 2010
来源：3rd International Symposium on Electronic Commerce and Security, ISECS 2010
关键词：Authenticated group key agreement; Decision Diffie-Hellman problem; Dynamic membership changes; m-branch tree; Provable security
摘要：In this paper, we present a scalable authenticated group key exchange protocol based on an m-branch tree (m > 3) where we first assume that m is generic and can identify the specific value of m finally depending on the actual application environment. Compared to others based on binary and ternary trees, our protocol reduces the height of key tree and rounds efficiently, therefore it is more scalable and suitable for large groups in ad-hoc network. In our scheme based on multi-tree, m sibling nodes at most at the same level agree on a key of their corresponding father node in the above level by invoking the protocol (DB) that Dutta and Barua presented. On the other hand, our scheme is authenticated and efficient in terms of communication and computation power through extending DB protocol that is provably secure under the Decision Diffie-Hellman (DDH) assumption in the standard model to dynamic group key agreement based on multi-tree. © 2010 IEEE.