[Resource Topic] 2009/096: A note on the security of MST3

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A note on the security of MST3

Authors: M. I. Gonzalez Vasco, A. L. Perez del Pozo, P. Taborda Duarte


In this paper, we study the recently proposed encryption scheme MST3, focusing on a concrete instantiation using Suzuki-2-groups. In a passive scenario, we argue that the one wayness of this scheme may not, as claimed, be proven without the assumption that factoring group elements with respect to random covers for a subset of the group is hard. As a result, we conclude that for the proposed Suzuki 2-groups instantiation, impractical key sizes should be used in order to prevent more or less straightforward factorization attacks.

ePrint: https://eprint.iacr.org/2009/096

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