$\pi$-Cipher, designed by Gligoroski et al. [17], is a second roundcandidate of the CAESAR competition. The designers analyzed the bitdiffusion of the cipher by examining the * operation and 1 round $\pi$-function [17]. We improve this analysis by applying Strict Avalanche Criterion(SAC) test to * operation and reduced round versions of $\pi$-functionfor $\pi$16-Cipher. We obtain that * operation fails SAC test whereas allversions of $\pi$-function for $\pi$16-Cipher pass the test.
@article{456,
title = {Improvement on bit diffusion analysis of $\pi$-Cipher},
journal = {Tatra Mountains Mathematical Publications},
volume = {70},
year = {2018},
language = {EN},
url = {http://dml.mathdoc.fr/item/456}
}
Sulak, Fatih; Bozdemir, Beyza; Özdemir, Betül A.; Koçak, Neşe; Koçak, Onur. Improvement on bit diffusion analysis of $\pi$-Cipher. Tatra Mountains Mathematical Publications, Tome 70 (2018) . http://gdmltest.u-ga.fr/item/456/