[Resource Topic] 2019/949: A Note on Parameter Choices of Round5

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A Note on Parameter Choices of Round5

Authors: Yongha Son


We examine the current parameter choice of Round5, and rectify its consideration of the improved dual attack due to Albrecht [Albrecht-EC17]: there is one significant optimization of Albrecht’s dual attack, which was not reflected to Round5 parameter choices. By taking this into consideration, some parameter choices of Round5 cannot enjoy the claimed security level.

ePrint: https://eprint.iacr.org/2019/949

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