High-order bit independence criterion test for the s-boxes
Sheng ua Gao, Wenping Ma, Jiwei Zhu · Wuhan University Journal of Natural Sciences · 2011
A new security test for the substitution boxes (S-boxes), high-order bit independence criterion (HOBIC) test, is presented. Different from the previous security tests for S-boxes, the HOBIC test can be used to measure the strength of an S-box against attacks that keep some of its input bits constant. Test results over the S-boxes of Data Encryption Standard (DES) and Advanced Encryption Standard (AES) are given and some possible applications of the HOBIC test are analyzed. Meanwhile, the source code for a basic version of the HOBIC test is also provided, the implement process of which shows that it is very fast and efficient for practical applications.