Preprint
Oct 2026
Equivalent Non-linear Shift Register Transformations and Espresso
This article has succeeded in transforming the LFSR in an Espresso-equivalent design reported by Yao and Parampalli to the Espresso alternate NFSR, and obtained a corresponding non-linear output function which achieves output-equivalence with the LFSR design, and hence, with Espresso.
Anirban Ghatak, Kaushik Sarkar, Anupam Chattopadhyay et al.
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