Sulak, FatihSulak,F.Bozdemir,B.Özdemir,B.A.Koçak,N.Koçak,O.Mathematics2024-07-052024-07-05201701210-319510.1515/tmmp-2017-00232-s2.0-85044994703https://doi.org/10.1515/tmmp-2017-0023https://hdl.handle.net/20.500.14411/3830π-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. © 2017 Mathematical Institute, Slovak Academy of Sciences.eninfo:eu-repo/semantics/openAccessbit diffusion analysisStrict Avalanche Criterion (SSAC) testThe CAESAR competitionπ-CipherArticleQ3701139149