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Published in:
2020 | OriginalPaper | Chapter
Authenticated Key Distribution: When the Coupon Collector is Your Enemy
Authors : Marc Beunardeau, Fatima-Ezzahra El Orche, Diana Maimuţ, David Naccache, Peter B. Rønne, Peter Y. A. Ryan
Published in: Innovative Security Solutions for Information Technology and Communications
Publisher: Springer International Publishing
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Abstract
We introduce new authenticated key exchange protocols which on one hand do not resort to standard public key setups with corresponding assumptions of computationally hard problems, but on the other hand are more efficient than distributing symmetric keys among the participants. To this end, we rely on a trusted central authority distributing key material which size is independent of the total number of users, and which allows the users to obtain shared secret keys. We analyze the security of our construction taking into account various attack models. Importantly, only symmetric primitives are needed in the protocol making it an alternative to quantum-safe key exchange protocols which rely on hardness assumptions.