ABSTRACT
C.E.Shannon introduced two designs Cryptography basic methods: diusion and confusion which are to resist the invaders on the statistical analysis of cryptosystems. We want to take full advantage of both, especially in block cipher designs which can eectively resist the invaders through the statistical characteristics of the cipher inferred key or plaintext. Diusion and confusion are the basis of design in modern block cipher, and AES is encryption and decryption algorithm based on a block cipher.
