A Study of Partial Non-Linear Layers with DEFAULT and BAKSHEESH

ePrint Report: A Study of Partial Non-Linear Layers with DEFAULT and BAKSHEESH

Anubhab Baksi

In this work, we take a look at the two recently proposed block ciphers, DEFAULT and BAKSHEESH, both of which are descendent of another block cipher named GIFT. We show that both ciphers can be interpreted within the partial non-linear layer category, thanks to the SBoxes having at least one non-trivial linear structure. We also reevaluate the security claim of DEFAULT.

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