Design and Analysis of Dynamic S-box Based on Feistel

As one of the core modules of block cipher algorithm, the S-box had a direct impact on the entire cipher algorithm. In order to improve the security strength, a lot researches and analyses on the block cipher algorithm have been done. The design scheme of dynamic S-box has been put forward through learning from the Feistel architecture and the reconstruction thought of S-box. After introducing the design in detail, we create S-boxes to do some analyses to verify its performance. The analyses in the end show that the value of this idea is worth further discussion and we see it as a potential research direction in block cipher encryption.