AES的基本要求是，采用对称分组密码体制，密钥长度的最少支持为128、192、256，分组长度128位，算法应易于各种硬件和软件实现。-The basic requirement is that AES, the use of symmetric block ciphers, the key length of at least support for the 128,192,256, 128-bit packet length, the algorithm should be easy to achieve a variety of hardware and software.