IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Online ISSN : 1745-1337
Print ISSN : 0916-8508
Special Section on Cryptography and Information Security
Modeling Leakage of Ephemeral Secrets in Tripartite/Group Key Exchange
Mark MANULISKoutarou SUZUKIBerkant USTAOGLU
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2013 Volume E96.A Issue 1 Pages 101-110

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Abstract

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.

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© 2013 The Institute of Electronics, Information and Communication Engineers
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