公开(公告)号：MY162666A

公开(公告)日：2017-06-30

申请号：MYPI2013004371

申请日：2013-12-04

Applicant: MIMOS BERHAD

Inventor： HERMAN BIN ISA ,  MUHAMMAD REZA BIN Z'ABA ,  ISKANDAR BIN BAHARI

IPC: G09C1/00 ,  H04L9/06

Abstract: Bijective substitution box is constructed from non-permutation power functions wherein said non-permutation functions are optimally converted to a permutation function by utilizing the heuristic algorithm of an Optimized Balanced Boolean Function Maker algorithm such that it has high cryptographic properties. The result is a bijective function, which provides desirable cryptographic properties such as high nonlinearity of 108 and high algebraic degree of 7. The said construction of bijective substitution boxes from non-permutation power functions using heuristic techniques comprising steps of first selecting a Boolean map from a plurality of linear power functions and high cryptographic properties power function (102, 104); extending an image of said extended image by utilizing Optimized Balanced Function Maker algorithm (110); and performing analysis on cryptographic properties of substituted box (112). The said steps are iterated until said cryptographic properties meets the predetermined condition of a cryptographically strong bijective substitution box.