Anonymous lattice-based group key transfer protocol

Adela Georgescu

Abstract


In this paper we introduce the first group key transfer protocol
secure in the lattice-based environment which achieves anonymity of the members
against each others. This issue is almost absent in the key transfer protocols
from the literature but we argue it is a practical property. We use two essential
cryptographic primitives for our protocol: lattice Diffie-Hellman key exchange
derived from Regev’s work [11] and a public key cryptosystem secure from the
LWE hardness and we achieve IND-CPA anonymity.

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DOI: https://doi.org/10.2478/tatra.v53i0.196