Improvement on Bit Diffusion Analysis of π-Cipher

Fatih Sulak, Beyza Bozdemir, Betül A. Özdemir, Neşe Koçak, Onur Koçak
2017 Tatra Mountains Mathematical Publications  
π-Cipher, designed by Gligoroski et al., is a second round candidate of the CAESAR competition. The designers analyzed the bit diffusion of the cipher by examining the * operation and 1 round π-function. We improve this analysis by applying Strict Avalanche Criterion (SAC) test to * operation and reduced round versions of π-function for π 16-Cipher. We found out that * operation fails SAC test whereas all versions of π-function for π 16-Cipher pass the test.
doi:10.1515/tmmp-2017-0023 fatcat:xljsjdk47jf7vix25knqmxq4cm