Dynamic asymmetric group key agreement for ad hoc networks

  • Authors:
  • Xingwen Zhao;Fangguo Zhang;Haibo Tian

  • Affiliations:
  • School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510275, China and Guangdong Key Laboratory of Information Security Technology, Guangzhou 510275, China;School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510275, China and Guangdong Key Laboratory of Information Security Technology, Guangzhou 510275, China;School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510275, China and Guangdong Key Laboratory of Information Security Technology, Guangzhou 510275, China

  • Venue:
  • Ad Hoc Networks
  • Year:
  • 2011

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Abstract

A group key agreement protocol allows a set of users to establish a common symmetric key via open networks. Dynamic asymmetric group key agreement means that a dynamic set of users form a temporary group and negotiate to share a public encryption key, so that anyone can send message securely and efficiently to the temporary group. Users can join or leave the group efficiently without triggering a completely new key agreement protocol, which will greatly benefit the users in ad hoc networks. We describe a generic construction of dynamic asymmetric group key agreement by combining a conventional authenticated group key agreement, a public key encryption and a multi-signature. Then we give out an instance with constant rounds of interactions and constant transmission cost for each participant.