Phyu Phyu Mar and Khin Maung Latt
New Analysis Methods on Strict Avalanche Criterion of SBoxes
899 - 903
2008
2
12
International Journal of Mathematical and Computational Sciences
https://publications.waset.org/pdf/9381
https://publications.waset.org/vol/24
World Academy of Science, Engineering and Technology
Sboxes (Substitution boxes) are keystones of modern
symmetric cryptosystems (block ciphers, as well as stream ciphers).
Sboxes bring nonlinearity to cryptosystems and strengthen their
cryptographic security. They are used for confusion in data security
An Sbox satisfies the strict avalanche criterion (SAC), if and only if
for any single input bit of the Sbox, the inversion of it changes each
output bit with probability one half. If a function (cryptographic
transformation) is complete, then each output bit depends on all of
the input bits. Thus, if it were possible to find the simplest Boolean
expression for each output bit in terms of the input bits, each of these
expressions would have to contain all of the input bits if the function
is complete. From some important properties of Sbox, the most
interesting property SAC (Strict Avalanche Criterion) is presented
and to analyze this property three analysis methods are proposed.
Open Science Index 24, 2008