Design of a Linear Layer Optimised for Bitsliced 32-bit Implementation

ePrint Report: Design of a Linear Layer Optimised for Bitsliced 32-bit Implementation

Gaëtan Leurent, Clara Pernot

The linear layer of block ciphers plays an important role in their security.
In particular, ciphers designed following the wide-trail strategy use the branch number of the linear layer to derive bounds on the probability of linear and differential trails.
At FSE 2014, the LS-design construction was introduced as a simple and regular structure to design bitsliced block ciphers. It considers the internal state …

block ciphers design eprint report implementation important linear report role security strategy