An inverse multiplexing method for irreducible polynomials is presented in this paper based on the theory of substitution boxes. The method is based on the theory of substitution boxes. Following a series of successful experiments, the new approach was put into practice. For reasons of increased complexity and security, the affine con-version period in the Galois field (2^8) has been increased to the maximum value of the period between input and output of 102, the Strict Avalanche Criterion (SAC) has been reduced to nearly half of its original value, and the results are bijective as a result. It was decided to use the number 112 after the Bit Independent Criterion effect had been re-duced to produce good results. These breakthroughs are being used to protect infor-mation security and to strengthen the advanced encryption standard that is currently in use, according to the researchers. In addition to the addition of a new s-box, their encryp-tion will be more secure and private, making our services even more valuable