Research of changeable S-Box in block cryptosystem based on chaos

This paper applies chaos theory to conventional cryptography, and takes DES for example, generated changeable S-box by using chaotic algorithm. In fact, it makes a conventional crypto-algorithm become a changeable one which is called as generalized one -time-one-algorithm. It can be illuminated that, by programming the system, the S-Box based on chaotic algorithm could effectively resist differential attacks and brute-force (exhaustive search) attacks of DES.