AES作为新一代的数据加密标准汇聚了强安全性、高性能、高效率、易用和灵活等优点。AES设计有三个密钥长度:128,192,256位，相对而言，AES的128密钥比DES的56密钥强1021倍。AES算法主要包括三个方面：轮变化、圈数和密钥扩展。-AES as a new generation of Data Encryption Standard security brings together strong, high performance, high efficiency, the advantages of easy-to-use and flexible. AES has three key design Length: 128192256, relatively speaking, AES 128-key keys than DES 56-fold strong 1021. AES algorithm mainly includes three aspects: round of changes in the number and key ring expansion.