Modeling Leakage of Ephemeral Secrets in Tripartite/Group Key Exchange

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概要

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• We propose a security model, referred as g-eCK model, for group key exchange that captures essentially all non-trivial leakage of static and ephemeral secret keys of participants, i.e., group key exchange version of extended Canetti-Krawczyk (eCK) model. Moreover, we propose the first one-round tripartite key exchange (3KE) protocol secure in the g-eCK model under the gap Bilinear Diffie-Hellman (gap BDH) assumption and in the random oracle model.

著者

• Suzuki Koutarou

  Ntt Information Sharing Platform Laboratories Ntt Corporation

• MANULIS Mark

  University of Surrey

• USTAOGLU Berkant

  Izmir Institute of Technology

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