Some c-(almost) perfect nonlinear functions

03/31/2020

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by   Constanza Riera, et al.

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In a prior paper, along with P. Ellingsen, P. Felke and A. Tkachenko, we defined a new (output) multiplicative differential, and the corresponding c-differential uniformity, which has the potential of extending the differential cryptanalysis. Here, we continue the work, by looking at some APN functions through the mentioned concept and show that their c-differential uniformity drops significantly, in some cases.