Indifferentiability of the Sponge Hash Family: New Attacks and the Optimal Construction

The sponge construction is subject to an indifferentiability security bound of c/2 bits, where c denotes the capacity. For a given b-bit permutation, the sponge construction allows sacrificing the rate r = b − c to achieve the theoretically optimal security bound of (b−1)/2 bits. However, the effic...

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Principais autores:	Hongli Li, Changlun Li, Honggang Hu, Fengmei Liu
פורמט:	Artigo
שפה:	Inglês
יצא לאור:	Ruhr-Universität Bochum 2026-03-01
סדרה:	IACR Transactions on Symmetric Cryptology
נושאים:	Permutation-based hash Indifferentiability t-CMT preimage resistance Sponge JH beyond birthday bound
גישה מקוונת:	https://tosc.iacr.org/index.php/ToSC/article/view/12778
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