Dynamic key dependent AES S-box generation with optimized quality analysis

Non-linear substitution is the essential step in the most popular Advanced Encryption Standard symmetric-key cryptosystem. Designing substitution boxes (S-boxes) with good quality solution and execution time efficiency are the significant challenges for the researchers for eliminating vulnerable attacks due to the static behavior of S-box. The main aim of this paper is to design a dynamic S-box for attaining the properties of high non-linearity and low autocorrelation. In this paper, a dynamic sub-key dependent S-box design is proposed to overcome the drawbacks of static S-box. The dynamic sub-key is generated based on the data block, so the proposed system is mostly depend on the data to provide more secure against the intruder. The proposed system generate a strong S-box with the good quality solutions and high efficiency in the execution time. The mapping of the non-linear initial S-box with the final sub-key generated S-box based on the cat swarm optimization function, so that the final S-box design is obtained as high non-linearity and low autocorrelation. The simulation performance is analyzed in in terms of solution quality and execution time compared with other relevant approaches.