A Collaborative Conference Key Agreement Scheme by Using an Intermediary Node

  • Authors:

  • Chin-Chen Chang;Hao-Chuan Tsai;Pen-Yi Chang Lijun Chu;Xuefeng Zheng;Shaojie Wang

  • Affiliations:

  • -;-;-;-;-

  • Venue:
  • ICCIT '07 Proceedings of the 2007 International Conference on Convergence Information Technology
  • Year:
  • 2007

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Abstract

Conference key agreement is one of the important issues in cryptography. In this paper, we propose a novel conference key agreement scheme. Without adopting the authenticated broadcasting channel model, we use an intermediary node to ensure the correctness of the transmitted messages. A passive adversary or an active adversary obtains zero knowledge about the common conference key established by the all honest participants who follow the proposed scheme. Keywords: conference key, Diffie-Hellman, passive adversary, active adversary, cryptography